#31425B
Closest named color: Dark Grey Blue (#29465B). oklch(37.6% 0.048 257.9), rgb(49, 66, 91).
Aa
White text reads best on this color (10.18:1).
About this color
#31425B is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.048 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.015 away. White text reads best on it, at 10.18:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.06:1 |
| White text | 10.18:1 |
Values
| HEX | #31425B |
| RGB | rgb(49, 66, 91) |
| HSL | hsl(216, 30%, 27%) |
| OKLCH | oklch(37.6% 0.048 257.9) |
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 #31425B | 10.18:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #31425B | 2.06:1 | Fails | Lc 10.3 | Not readable |
| #31425B text on white | 10.18:1 | AAA | Lc 93.6 | Preferred for body text |
| #31425B text on black | 2.06:1 | Fails | Lc -8.9 | Not readable |
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 900.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D1DAE7
oklch(88.5% 0.02 257.5)
-
Step 300
300
#B2C2D9
oklch(80.9% 0.037 257.4)
-
Step 400
400
#8AA2C5
oklch(70.6% 0.058 257.7)
-
Step 500
500
#6D8BB7
oklch(63.1% 0.075 257.8)
-
Step 600
600
#5574A2
oklch(55.5% 0.081 258.1)
-
Step 700
700
#45628B
oklch(49.2% 0.075 257.1)
-
Step 800
800
#395071
oklch(42.7% 0.062 257.4)
-
Step 900
900 (this color)
#31425B
oklch(37.6% 0.048 257.9)
-
Step 950
950
#1D2735
oklch(27% 0.03 256.9)
#31425B 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) | #39435C | 0.012 |
| Deuteranopia (no green cones) | #343F5A | 0.010 |
| Tritanopia (no blue cones) | #22474B | 0.041 |
| Achromatopsia (no color) | #414141 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31425B
#31425B
oklch(37.6% 0.048 257.9)
- #4F3E22
#4F3E22
oklch(37.5% 0.049 78.9)
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 #31425B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.015
- Charcoal #264653 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.044
- Onyx #343A40 ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.053
- Midnight Green #073B4C ΔE 0.056
Use #31425B 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.