#31353F
Closest named color: Onyx (#343A40). oklch(32.9% 0.019 268.1), rgb(49, 53, 63).
Aa
White text reads best on this color (12.26:1).
About this color
#31353F is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.018 away. White text reads best on it, at 12.26:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.71:1 |
| White text | 12.26:1 |
Values
| HEX | #31353F |
| RGB | rgb(49, 53, 63) |
| HSL | hsl(223, 13%, 22%) |
| OKLCH | oklch(32.9% 0.019 268.1) |
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 #31353F | 12.26:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #31353F | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #31353F text on white | 12.26:1 | AAA | Lc 98.0 | Preferred for body text |
| #31353F text on black | 1.71:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9EAED
oklch(93.7% 0.004 271.4)
-
Step 200
200
#D7D9DE
oklch(88.5% 0.007 268.5)
-
Step 300
300
#BDC0CA
oklch(80.8% 0.014 272.7)
-
Step 400
400
#9AA0AF
oklch(70.6% 0.023 268.3)
-
Step 500
500
#82899B
oklch(63% 0.028 268.7)
-
Step 600
600
#6B7386
oklch(55.6% 0.031 267.3)
-
Step 700
700
#5A6072
oklch(49.1% 0.03 270.7)
-
Step 800
800
#494F5C
oklch(42.7% 0.023 265.8)
-
Step 900
900 (this color)
#31353F
oklch(32.9% 0.019 268.1)
-
Step 950
950
#24262C
oklch(26.9% 0.012 271)
#31353F 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) | #32363F | 0.004 |
| Deuteranopia (no green cones) | #31343F | 0.003 |
| Tritanopia (no blue cones) | #2E3738 | 0.017 |
| Achromatopsia (no color) | #353535 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31353F
#31353F
oklch(32.9% 0.019 268.1)
- #39352A
#39352A
oklch(33% 0.019 90.4)
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 #31353F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.018
- Gunmetal #293241 ΔE 0.018
- Space Cadet #2B2D42 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.045
- Midnight Green #073B4C ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.050
- Charcoal #264653 ΔE 0.056
Use #31353F 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.