#313D38
Closest named color: Onyx (#343A40). oklch(34.7% 0.018 168.1), rgb(49, 61, 56).
Aa
White text reads best on this color (11.31:1).
About this color
#313D38 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.021 away. White text reads best on it, at 11.31:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.85:1 |
| White text | 11.31:1 |
Values
| HEX | #313D38 |
| RGB | rgb(49, 61, 56) |
| HSL | hsl(155, 11%, 22%) |
| OKLCH | oklch(34.7% 0.018 168.1) |
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 #313D38 | 11.31:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #313D38 | 1.85:1 | Fails | Lc 7.8 | Not readable |
| #313D38 text on white | 11.31:1 | AAA | Lc 96.1 | Preferred for body text |
| #313D38 text on black | 1.85:1 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D5DBD8
oklch(88.6% 0.008 164.9)
-
Step 300
300
#B9C4BF
oklch(81% 0.014 167.1)
-
Step 400
400
#94A59E
oklch(70.6% 0.022 169.1)
-
Step 500
500
#7A8F86
oklch(63.1% 0.028 167.7)
-
Step 600
600
#637970
oklch(55.6% 0.029 168.5)
-
Step 700
700
#52665E
oklch(49.1% 0.027 168.9)
-
Step 800
800
#43534C
oklch(42.6% 0.023 166.9)
-
Step 900
900 (this color)
#313D38
oklch(34.7% 0.018 168.1)
-
Step 950
950
#212825
oklch(26.9% 0.011 167.8)
#313D38 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) | #3C3B38 | 0.018 |
| Deuteranopia (no green cones) | #3A3A38 | 0.017 |
| Tritanopia (no blue cones) | #2F3D3B | 0.006 |
| Achromatopsia (no color) | #3A3A3A | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313D38
#313D38
oklch(34.7% 0.018 168.1)
- #41363B
#41363B
oklch(34.6% 0.018 348.9)
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 #313D38, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.021
- Charcoal Grey #3C4142 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.045
- Charcoal #264653 ΔE 0.047
- Gunmetal #293241 ΔE 0.048
- Pakistan Green #283618 ΔE 0.054
- Midnight Green #073B4C ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.059
Use #313D38 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.