#3B313D
Closest named color: Onyx (#343A40). oklch(32.9% 0.025 320.6), rgb(59, 49, 61).
Aa
White text reads best on this color (12.40:1).
About this color
#3B313D is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.029 away. White text reads best on it, at 12.40:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.69:1 |
| White text | 12.40:1 |
Values
| HEX | #3B313D |
| RGB | rgb(59, 49, 61) |
| HSL | hsl(290, 11%, 22%) |
| OKLCH | oklch(32.9% 0.025 320.6) |
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 #3B313D | 12.40:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #3B313D | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #3B313D text on white | 12.40:1 | AAA | Lc 98.2 | Preferred for body text |
| #3B313D text on black | 1.69:1 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DCD7DD
oklch(88.5% 0.01 320.5)
-
Step 300
300
#C6BDC8
oklch(80.9% 0.018 320.1)
-
Step 400
400
#A99BAC
oklch(70.7% 0.029 320.3)
-
Step 500
500
#948298
oklch(63% 0.039 320.1)
-
Step 600
600
#7F6C82
oklch(55.7% 0.04 321.7)
-
Step 700
700
#6B5A6E
oklch(49.1% 0.038 321.2)
-
Step 800
800
#57495A
oklch(42.6% 0.033 320.3)
-
Step 900
900 (this color)
#3B313D
oklch(32.9% 0.025 320.6)
-
Step 950
950
#2A242B
oklch(27% 0.015 321.4)
#3B313D 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) | #30343E | 0.020 |
| Deuteranopia (no green cones) | #32353D | 0.019 |
| Tritanopia (no blue cones) | #3B3235 | 0.016 |
| Achromatopsia (no color) | #343434 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B313D
#3B313D
oklch(32.9% 0.025 320.6)
- #2E382C
#2E382C
oklch(32.7% 0.025 140.4)
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 #3B313D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.029
- Gunmetal #293241 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.061
- Midnight Green #073B4C ΔE 0.066
- Oxford Blue #1B263B ΔE 0.070
Use #3B313D 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.