#031D23
Closest named color: Rich Black (#0D1B2A). oklch(21.4% 0.034 215.4), rgb(3, 29, 35).
Aa
White text reads best on this color (17.44:1).
About this color
#031D23 is a very dark, muted teal or cyan. In OKLCH its lightness is 21%, its chroma 0.034 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 17.44:1.
| Hue family | Teals and cyans |
| Lightness | very dark (21%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.44:1 |
Values
| HEX | #031D23 |
| RGB | rgb(3, 29, 35) |
| HSL | hsl(191, 84%, 7%) |
| OKLCH | oklch(21.4% 0.034 215.4) |
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 #031D23 | 17.44:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #031D23 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #031D23 text on white | 17.44:1 | AAA | Lc 104.1 | Preferred for body text |
| #031D23 text on black | 1.20:1 | 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 950.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#C9DDE2
oklch(88.4% 0.022 214.4)
-
Step 300
300
#A4C8D1
oklch(81% 0.04 214.6)
-
Step 400
400
#71ABBA
oklch(70.7% 0.064 215.8)
-
Step 500
500
#4696A9
oklch(63.1% 0.083 215.6)
-
Step 600
600
#208094
oklch(55.6% 0.089 215.4)
-
Step 700
700
#0E6C7E
oklch(49% 0.083 215.2)
-
Step 800
800
#135867
oklch(42.7% 0.069 216.2)
-
Step 900
900
#194954
oklch(37.8% 0.054 215.6)
-
Step 950
950 (this color)
#031D23
oklch(21.4% 0.034 215.4)
#031D23 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) | #191C23 | 0.030 |
| Deuteranopia (no green cones) | #141823 | 0.028 |
| Tritanopia (no blue cones) | #001F1F | 0.013 |
| Achromatopsia (no color) | #1A1A1A | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031D23
#031D23
oklch(21.4% 0.034 215.4)
- #27130E
#27130E
oklch(21.4% 0.035 34.9)
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 #031D23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Rich Navy #001219 ΔE 0.045
- Dark #1B2431 ΔE 0.050
- Jet #212529 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.064
- Almost Black #070D0D ΔE 0.066
- Navy Blue #001146 ΔE 0.083
- Dark Forest Green #002D04 ΔE 0.091
Use #031D23 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.