#6475BB
Closest named color: Windows Blue (#3778BF). oklch(58% 0.11 272.2), rgb(100, 117, 187).
Aa
Black text reads best on this color (4.80:1).
About this color
#6475BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.110 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.047 away. Black text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.80:1 |
| White text | 4.37:1 |
Values
| HEX | #6475BB |
| RGB | rgb(100, 117, 187) |
| HSL | hsl(228, 39%, 56%) |
| OKLCH | oklch(58% 0.11 272.2) |
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 #6475BB | 4.37:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #6475BB | 4.80:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #6475BB text on white | 4.37:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #6475BB text on black | 4.80:1 | AA | Lc -31.5 | 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
#B5BFE1
oklch(80.8% 0.049 272.4)
-
Step 400
400
#8F9ED2
oklch(70.7% 0.078 271.8)
-
Step 500
500
#7485C7
oklch(63.1% 0.102 272.2)
-
Step 600
600 (this color)
#6475BB
oklch(58% 0.11 272.2)
-
Step 700
700
#4D5C9A
oklch(49.2% 0.101 272)
-
Step 800
800
#3F4B7D
oklch(42.7% 0.084 272.2)
-
Step 900
900
#363F65
oklch(37.8% 0.066 272.7)
-
Step 950
950
#1F253B
oklch(27% 0.042 271.7)
#6475BB 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) | #5B7DBE | 0.023 |
| Deuteranopia (no green cones) | #5375B9 | 0.021 |
| Tritanopia (no blue cones) | #44848F | 0.099 |
| Achromatopsia (no color) | #797979 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6475BB
#6475BB
oklch(58% 0.11 272.2)
- #91781B
#91781B
oklch(58% 0.11 92.8)
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 #6475BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.047
- Cool Blue #4984B8 ΔE 0.049
- Steel Blue #4682B4 ΔE 0.050
- Off Blue #5684AE ΔE 0.053
- French Blue #436BAD ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.057
- Dusty Blue #5A86AD ΔE 0.058
- Dull Blue #49759C ΔE 0.061
Use #6475BB 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.