#31434E
Closest named color: Charcoal (#264653). oklch(37.2% 0.03 235.5), rgb(49, 67, 78).
Aa
White text reads best on this color (10.27:1).
About this color
#31434E is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Charcoal (#264653), ΔE 0.016 away. White text reads best on it, at 10.27:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Charcoal (#264653) |
| Black text | 2.04:1 |
| White text | 10.27:1 |
Values
| HEX | #31434E |
| RGB | rgb(49, 67, 78) |
| HSL | hsl(203, 23%, 25%) |
| OKLCH | oklch(37.2% 0.03 235.5) |
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 #31434E | 10.27:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #31434E | 2.04:1 | Fails | Lc 10.1 | Not readable |
| #31434E text on white | 10.27:1 | AAA | Lc 93.8 | Preferred for body text |
| #31434E text on black | 2.04:1 | Fails | Lc -8.7 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D2DBE0
oklch(88.6% 0.012 231.7)
-
Step 300
300
#B4C3CD
oklch(80.9% 0.022 236.8)
-
Step 400
400
#8CA5B4
oklch(70.8% 0.035 234.3)
-
Step 500
500
#6F8EA2
oklch(63% 0.046 236.8)
-
Step 600
600
#57788D
oklch(55.6% 0.05 236.8)
-
Step 700
700
#476577
oklch(49.1% 0.045 235.3)
-
Step 800
800
#3A5361
oklch(42.8% 0.038 233.4)
-
Step 900
900 (this color)
#31434E
oklch(37.2% 0.03 235.5)
-
Step 950
950
#1E282E
oklch(27% 0.018 234.7)
#31434E 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) | #3E424F | 0.020 |
| Deuteranopia (no green cones) | #3A3F4E | 0.018 |
| Tritanopia (no blue cones) | #274646 | 0.024 |
| Achromatopsia (no color) | #414141 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31434E
#31434E
oklch(37.2% 0.03 235.5)
- #4D3C31
#4D3C31
oklch(37.1% 0.03 54.5)
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 #31434E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.016
- Dark Grey Blue #29465B ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.024
- Onyx #343A40 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.037
- Dark Slate Gray #2F4F4F ΔE 0.039
- Dark Teal #014D4E ΔE 0.046
- Midnight Green #073B4C ΔE 0.052
Use #31434E 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.