#31423F
Closest named color: Charcoal Grey (#3C4142). oklch(36.3% 0.022 183), rgb(49, 66, 63).
Aa
White text reads best on this color (10.59:1).
About this color
#31423F is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.018 away. White text reads best on it, at 10.59:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.98:1 |
| White text | 10.59:1 |
Values
| HEX | #31423F |
| RGB | rgb(49, 66, 63) |
| HSL | hsl(169, 15%, 23%) |
| OKLCH | oklch(36.3% 0.022 183) |
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 #31423F | 10.59:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #31423F | 1.98:1 | Fails | Lc 9.3 | Not readable |
| #31423F text on white | 10.59:1 | AAA | Lc 94.6 | Preferred for body text |
| #31423F text on black | 1.98:1 | Fails | Lc -8.0 | 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
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D3DBD9
oklch(88.5% 0.009 179.6)
-
Step 300
300
#B5C4C1
oklch(80.8% 0.017 182.6)
-
Step 400
400
#8FA6A2
oklch(70.6% 0.026 183.9)
-
Step 500
500
#73918B
oklch(63.2% 0.035 181.6)
-
Step 600
600
#5B7B75
oklch(55.6% 0.038 182.1)
-
Step 700
700
#4B6762
oklch(49% 0.034 182.7)
-
Step 800
800
#3D5450
oklch(42.6% 0.029 183)
-
Step 900
900 (this color)
#31423F
oklch(36.3% 0.022 183)
-
Step 950
950
#1F2927
oklch(27.1% 0.014 181.6)
#31423F 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) | #40403F | 0.023 |
| Deuteranopia (no green cones) | #3D3E3F | 0.022 |
| Tritanopia (no blue cones) | #2C4341 | 0.007 |
| Achromatopsia (no color) | #3F3F3F | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31423F
#31423F
oklch(36.3% 0.022 183)
- #49393D
#49393D
oklch(36.3% 0.023 1.6)
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 #31423F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.018
- Onyx #343A40 ΔE 0.028
- Charcoal #264653 ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.046
- Dark Teal #014D4E ΔE 0.047
- Midnight Green #073B4C ΔE 0.056
Use #31423F 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.