#6575B8
Closest named color: Windows Blue (#3778BF). oklch(57.9% 0.105 272.6), rgb(101, 117, 184).
Aa
Black text reads best on this color (4.78:1).
About this color
#6575B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.105 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.048 away. Black text reads best on it, at 4.78:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.78:1 |
| White text | 4.38:1 |
Values
| HEX | #6575B8 |
| RGB | rgb(101, 117, 184) |
| HSL | hsl(228, 37%, 56%) |
| OKLCH | oklch(57.9% 0.105 272.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #6575B8 | 4.38:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #6575B8 | 4.78:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #6575B8 text on white | 4.38:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #6575B8 text on black | 4.78:1 | AA | Lc -31.4 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F3
oklch(93.5% 0.014 272.7)
-
Step 200
200
#D3D8EB
oklch(88.4% 0.027 274.1)
-
Step 300
300
#B6BFE0
oklch(80.8% 0.048 273.3)
-
Step 400
400
#909ED0
oklch(70.7% 0.075 272.3)
-
Step 500
500
#7685C4
oklch(63% 0.097 273.1)
-
Step 600
600 (this color)
#6575B8
oklch(57.9% 0.105 272.6)
-
Step 700
700
#4E5C98
oklch(49.1% 0.098 272.4)
-
Step 800
800
#404B7B
oklch(42.6% 0.081 272.8)
-
Step 900
900
#363F63
oklch(37.7% 0.063 272.4)
-
Step 950
950
#20253A
oklch(27% 0.04 273.2)
#6575B8 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #5D7CBB | 0.020 |
| Deuteranopia (no green cones) | #5575B6 | 0.021 |
| Tritanopia (no blue cones) | #48838E | 0.093 |
| Achromatopsia (no color) | #787878 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6575B8
#6575B8
oklch(57.9% 0.105 272.6)
- #907822
#907822
oklch(58% 0.105 92.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #6575B8, closest first.
No curated palette has a color within ΔE 0.04 of #6575B8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.048
- Steel Blue #4682B4 ΔE 0.049
- Cool Blue #4984B8 ΔE 0.049
- Off Blue #5684AE ΔE 0.050
- French Blue #436BAD ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.056
- Dull Blue #49759C ΔE 0.058
Use #6575B8 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.