#6375B6
Closest named color: Steel Blue (#4682B4). oklch(57.6% 0.103 271.1), rgb(99, 117, 182).
Aa
Black text reads best on this color (4.75:1).
About this color
#6375B6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.103 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.046 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.75:1 |
| White text | 4.42:1 |
Values
| HEX | #6375B6 |
| RGB | rgb(99, 117, 182) |
| HSL | hsl(227, 36%, 55%) |
| OKLCH | oklch(57.6% 0.103 271.1) |
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 #6375B6 | 4.42:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #6375B6 | 4.75:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #6375B6 text on white | 4.42:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #6375B6 text on black | 4.75:1 | AA | Lc -31.1 | 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
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D3D9EB
oklch(88.6% 0.026 271.1)
-
Step 300
300
#B5C0DF
oklch(80.9% 0.045 269.9)
-
Step 400
400
#8F9FCF
oklch(70.8% 0.073 270.2)
-
Step 500
500
#7486C3
oklch(63.1% 0.095 270.9)
-
Step 600
600 (this color)
#6375B6
oklch(57.6% 0.103 271.1)
-
Step 700
700
#4D5D97
oklch(49.2% 0.095 270.9)
-
Step 800
800
#3F4C7A
oklch(42.7% 0.078 270.8)
-
Step 900
900
#363F62
oklch(37.6% 0.061 272.2)
-
Step 950
950
#1F253A
oklch(26.9% 0.04 271.3)
#6375B6 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) | #5D7CB9 | 0.019 |
| Deuteranopia (no green cones) | #5675B5 | 0.016 |
| Tritanopia (no blue cones) | #45828D | 0.091 |
| Achromatopsia (no color) | #787878 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6375B6
#6375B6
oklch(57.6% 0.103 271.1)
- #907625
#907625
oklch(57.6% 0.102 90.6)
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 #6375B6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.046
- Windows Blue #3778BF ΔE 0.046
- Cool Blue #4984B8 ΔE 0.047
- Off Blue #5684AE ΔE 0.048
- Flat Blue #3C73A8 ΔE 0.051
- French Blue #436BAD ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.054
- Dull Blue #49759C ΔE 0.054
Use #6375B6 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.