#313E33
Closest named color: Onyx (#343A40). oklch(34.8% 0.026 149.4), rgb(49, 62, 51).
Aa
White text reads best on this color (11.24:1).
About this color
#313E33 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.031 away. White text reads best on it, at 11.24:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #313E33 |
| RGB | rgb(49, 62, 51) |
| HSL | hsl(129, 12%, 22%) |
| OKLCH | oklch(34.8% 0.026 149.4) |
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 #313E33 | 11.24:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #313E33 | 1.86:1 | Fails | Lc 7.9 | Not readable |
| #313E33 text on white | 11.24:1 | AAA | Lc 96.0 | Preferred for body text |
| #313E33 text on black | 1.86:1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D4DBD5
oklch(88.4% 0.011 149.8)
-
Step 300
300
#B8C4BA
oklch(80.8% 0.019 150.5)
-
Step 400
400
#94A696
oklch(70.6% 0.031 148.4)
-
Step 500
500
#79907D
oklch(63% 0.039 150.2)
-
Step 600
600
#627B66
oklch(55.7% 0.043 149.5)
-
Step 700
700
#516755
oklch(49% 0.039 150.2)
-
Step 800
800
#435445
oklch(42.7% 0.032 148.2)
-
Step 900
900 (this color)
#313E33
oklch(34.8% 0.026 149.4)
-
Step 950
950
#212922
oklch(27.1% 0.017 148.6)
#313E33 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) | #3E3C32 | 0.021 |
| Deuteranopia (no green cones) | #3C3A34 | 0.022 |
| Tritanopia (no blue cones) | #2F3D3B | 0.015 |
| Achromatopsia (no color) | #3B3B3B | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313E33
#313E33
oklch(34.8% 0.026 149.4)
- #423541
#423541
oklch(34.8% 0.027 328.6)
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 #313E33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.032
- Pakistan Green #283618 ΔE 0.047
- Charcoal #264653 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.054
- Evergreen #05472A ΔE 0.055
- Gunmetal #293241 ΔE 0.056
- Dark Olive #373E02 ΔE 0.058
Use #313E33 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.