#31353D
Closest named color: Onyx (#343A40). oklch(32.8% 0.015 264.3), rgb(49, 53, 61).
Aa
White text reads best on this color (12.30:1).
About this color
#31353D is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.017 away. White text reads best on it, at 12.30:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.70:1 |
| White text | 12.30:1 |
Values
| HEX | #31353D |
| RGB | rgb(49, 53, 61) |
| HSL | hsl(220, 11%, 22%) |
| OKLCH | oklch(32.8% 0.015 264.3) |
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 #31353D | 12.30:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #31353D | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #31353D text on white | 12.30:1 | AAA | Lc 98.1 | Preferred for body text |
| #31353D text on black | 1.70:1 | Fails | Lc 0.0 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E9EAEC
oklch(93.7% 0.003 264.5)
-
Step 200
200
#D7D9DD
oklch(88.5% 0.006 264.5)
-
Step 300
300
#BDC1C8
oklch(81% 0.011 261.8)
-
Step 400
400
#9BA1AC
oklch(70.8% 0.017 262.7)
-
Step 500
500
#828A98
oklch(63.2% 0.023 261.7)
-
Step 600
600
#6C7383
oklch(55.5% 0.026 266.7)
-
Step 700
700
#5A616F
oklch(49.2% 0.024 264.3)
-
Step 800
800
#4A4F5A
oklch(42.7% 0.019 266.1)
-
Step 900
900 (this color)
#31353D
oklch(32.8% 0.015 264.3)
-
Step 950
950
#24262B
oklch(26.9% 0.01 268.3)
#31353D 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) | #33353D | 0.003 |
| Deuteranopia (no green cones) | #31343D | 0.003 |
| Tritanopia (no blue cones) | #2E3738 | 0.014 |
| Achromatopsia (no color) | #353535 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31353D
#31353D
oklch(32.8% 0.015 264.3)
- #39342C
#39342C
oklch(32.8% 0.015 79.6)
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 #31353D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.017
- Gunmetal #293241 ΔE 0.019
- Space Cadet #2B2D42 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.044
- Midnight Green #073B4C ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.053
- Charcoal #264653 ΔE 0.058
Use #31353D 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.