#6375AB
Closest named color: Stormy Blue (#507B9C). oklch(57.1% 0.087 269.5), rgb(99, 117, 171).
Aa
Black text reads best on this color (4.66:1).
About this color
#6375AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.087 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.040 away. Black text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.66:1 |
| White text | 4.50:1 |
Values
| HEX | #6375AB |
| RGB | rgb(99, 117, 171) |
| HSL | hsl(225, 30%, 53%) |
| OKLCH | oklch(57.1% 0.087 269.5) |
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 #6375AB | 4.50:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #6375AB | 4.66:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #6375AB text on white | 4.50:1 | AA | Lc 71.2 | Content text, not long reading |
| #6375AB text on black | 4.66:1 | AA | Lc -30.5 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D3D9E8
oklch(88.5% 0.022 268.4)
-
Step 300
300
#B6C0DB
oklch(80.9% 0.04 269.4)
-
Step 400
400
#919FC8
oklch(70.6% 0.062 270.1)
-
Step 500
500
#7687BA
oklch(63% 0.08 269.8)
-
Step 600
600 (this color)
#6375AB
oklch(57.1% 0.087 269.5)
-
Step 700
700
#4E5E8F
oklch(49% 0.081 269.5)
-
Step 800
800
#404D74
oklch(42.7% 0.067 269.4)
-
Step 900
900
#36405D
oklch(37.6% 0.052 269.2)
-
Step 950
950
#202637
oklch(27.1% 0.033 269.2)
#6375AB 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) | #627AAD | 0.014 |
| Deuteranopia (no green cones) | #5C74AA | 0.010 |
| Tritanopia (no blue cones) | #4B8088 | 0.078 |
| Achromatopsia (no color) | #777777 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6375AB
#6375AB
oklch(57.1% 0.087 269.5)
- #8C7536
#8C7536
oklch(57.1% 0.087 89.4)
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 #6375AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.040
- Dull Blue #49759C ΔE 0.041
- Off Blue #5684AE ΔE 0.043
- Steel Blue #4682B4 ΔE 0.044
- Flat Blue #3C73A8 ΔE 0.046
- Cerulean #457B9D ΔE 0.047
- Cool Blue #4984B8 ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.048
Use #6375AB 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.