#6575BC
Closest named color: Windows Blue (#3778BF). oklch(58.1% 0.111 272.9), rgb(101, 117, 188).
Aa
Black text reads best on this color (4.82:1).
About this color
#6575BC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.111 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 4.82:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #6575BC |
| RGB | rgb(101, 117, 188) |
| HSL | hsl(229, 39%, 57%) |
| OKLCH | oklch(58.1% 0.111 272.9) |
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 #6575BC | 4.35:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #6575BC | 4.82:1 | AA | Lc 34.0 | Non-text elements, placeholder text |
| #6575BC text on white | 4.35:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #6575BC text on black | 4.82:1 | AA | Lc -31.6 | 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
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D3D8EC
oklch(88.4% 0.028 274.6)
-
Step 300
300
#B5BFE2
oklch(80.8% 0.051 272.7)
-
Step 400
400
#909ED3
oklch(70.8% 0.079 272.8)
-
Step 500
500
#7585C7
oklch(63.1% 0.101 272.8)
-
Step 600
600 (this color)
#6575BC
oklch(58.1% 0.111 272.9)
-
Step 700
700
#4E5B9B
oklch(49.1% 0.104 273.3)
-
Step 800
800
#404B7E
oklch(42.8% 0.086 273.1)
-
Step 900
900
#363F65
oklch(37.8% 0.066 272.7)
-
Step 950
950
#20253B
oklch(27.1% 0.042 273.5)
#6575BC 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) | #5B7DBF | 0.023 |
| Deuteranopia (no green cones) | #5376BA | 0.023 |
| Tritanopia (no blue cones) | #45848F | 0.100 |
| Achromatopsia (no color) | #797979 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6575BC
#6575BC
oklch(58.1% 0.111 272.9)
- #917819
#917819
oklch(58% 0.111 93)
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 #6575BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.048
- Cool Blue #4984B8 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.051
- Off Blue #5684AE ΔE 0.054
- French Blue #436BAD ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.059
- Dusty Blue #5A86AD ΔE 0.059
- Dull Blue #49759C ΔE 0.063
Use #6575BC 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.