#031D28
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.039 229.1), rgb(3, 29, 40).
Aa
White text reads best on this color (17.35:1).
About this color
#031D28 is a very dark, muted teal or cyan. In OKLCH its lightness is 22%, its chroma 0.039 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.015 away. White text reads best on it, at 17.35:1.
| Hue family | Teals and cyans |
| Lightness | very dark (22%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.35:1 |
Values
| HEX | #031D28 |
| RGB | rgb(3, 29, 40) |
| HSL | hsl(198, 86%, 8%) |
| OKLCH | oklch(21.7% 0.039 229.1) |
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 #031D28 | 17.35:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #031D28 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #031D28 text on white | 17.35:1 | AAA | Lc 104.1 | Preferred for body text |
| #031D28 text on black | 1.21:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A3C7D8
oklch(80.9% 0.045 228.2)
-
Step 400
400
#6FAAC5
oklch(70.8% 0.073 228.6)
-
Step 500
500
#4494B7
oklch(63.1% 0.094 229.5)
-
Step 600
600
#1C7EA3
oklch(55.7% 0.102 229.3)
-
Step 700
700
#096A8B
oklch(49.1% 0.094 229)
-
Step 800
800
#105771
oklch(42.8% 0.078 228.6)
-
Step 900
900
#18475B
oklch(37.6% 0.061 229.7)
-
Step 950
950 (this color)
#031D28
oklch(21.7% 0.039 229.1)
#031D28 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) | #171C29 | 0.027 |
| Deuteranopia (no green cones) | #121928 | 0.023 |
| Tritanopia (no blue cones) | #002021 | 0.021 |
| Achromatopsia (no color) | #1A1A1A | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031D28
#031D28
oklch(21.7% 0.039 229.1)
- #281409
#281409
oklch(21.7% 0.038 48.7)
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 #031D28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.015
- Dark #1B2431 ΔE 0.045
- Rich Navy #001219 ΔE 0.048
- Jet #212529 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.057
- Almost Black #070D0D ΔE 0.071
- Navy Blue #001146 ΔE 0.073
- Dark Navy #000435 ΔE 0.088
Use #031D28 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.