#31576E
Closest named color: YInMn Blue (#415A77). oklch(43.9% 0.058 236.7), rgb(49, 87, 110).
Aa
White text reads best on this color (7.72:1).
About this color
#31576E is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.058 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.027 away. White text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #31576E |
| RGB | rgb(49, 87, 110) |
| HSL | hsl(203, 38%, 31%) |
| OKLCH | oklch(43.9% 0.058 236.7) |
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 #31576E | 7.72:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #31576E | 2.71:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #31576E text on white | 7.72:1 | AAA | Lc 86.7 | Fine for body text |
| #31576E text on black | 2.71:1 | Fails | Lc -15.4 | Dividers and decoration only |
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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ADC4D4
oklch(80.8% 0.034 238.3)
-
Step 400
400
#81A6BE
oklch(70.6% 0.054 237)
-
Step 500
500
#6090AE
oklch(63.1% 0.069 236.8)
-
Step 600
600
#457A9A
oklch(55.6% 0.075 236.8)
-
Step 700
700
#376783
oklch(49.2% 0.069 236.1)
-
Step 800
800 (this color)
#31576E
oklch(43.9% 0.058 236.7)
-
Step 900
900
#294557
oklch(37.6% 0.046 237.9)
-
Step 950
950
#192933
oklch(27.1% 0.028 236.7)
#31576E 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) | #4C566F | 0.034 |
| Deuteranopia (no green cones) | #44506E | 0.030 |
| Tritanopia (no blue cones) | #0B5D5F | 0.045 |
| Achromatopsia (no color) | #535353 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31576E
#31576E
oklch(43.9% 0.058 236.7)
- #6B4A32
#6B4A32
oklch(43.9% 0.058 56.6)
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 #31576E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.027
- Petrol #005F6A ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.046
- Dusty Grape #545775 ΔE 0.049
- Deep Teal #00555A ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.052
- Light Navy #155084 ΔE 0.053
Use #31576E 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.