#6375A3
Closest named color: Stormy Blue (#507B9C). oklch(56.7% 0.075 267.6), rgb(99, 117, 163).
Aa
Black text reads best on this color (4.60:1).
About this color
#6375A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.075 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.032 away. Black text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.60:1 |
| White text | 4.56:1 |
Values
| HEX | #6375A3 |
| RGB | rgb(99, 117, 163) |
| HSL | hsl(223, 26%, 51%) |
| OKLCH | oklch(56.7% 0.075 267.6) |
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 #6375A3 | 4.56:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #6375A3 | 4.60:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #6375A3 text on white | 4.56:1 | AA | Lc 71.6 | Content text, not long reading |
| #6375A3 text on black | 4.60:1 | AA | Lc -30.0 | 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
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E6
oklch(88.5% 0.019 269.1)
-
Step 300
300
#B7C0D7
oklch(80.8% 0.034 268.6)
-
Step 400
400
#92A0C3
oklch(70.7% 0.054 267.9)
-
Step 500
500
#7788B4
oklch(63% 0.07 268)
-
Step 600
600 (this color)
#6375A3
oklch(56.7% 0.075 267.6)
-
Step 700
700
#4F5F89
oklch(49% 0.071 267.8)
-
Step 800
800
#414E6F
oklch(42.7% 0.058 267.4)
-
Step 900
900
#37415A
oklch(37.7% 0.045 267.4)
-
Step 950
950
#202635
oklch(27% 0.029 267.5)
#6375A3 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) | #6579A5 | 0.012 |
| Deuteranopia (no green cones) | #5F73A2 | 0.008 |
| Tritanopia (no blue cones) | #4F7E85 | 0.066 |
| Achromatopsia (no color) | #767676 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6375A3
#6375A3
oklch(56.7% 0.075 267.6)
- #897440
#897440
oklch(56.7% 0.075 88)
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 #6375A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.032
- Dull Blue #49759C ΔE 0.034
- Cerulean #457B9D ΔE 0.040
- Off Blue #5684AE ΔE 0.042
- Metallic Blue #4F738E ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.046
- Grey Blue #647D8E ΔE 0.046
- Steel Blue #4682B4 ΔE 0.046
Use #6375A3 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.