#031C2F
Closest named color: Rich Black (#0D1B2A). oklch(21.8% 0.049 244.4), rgb(3, 28, 47).
Aa
White text reads best on this color (17.34:1).
About this color
#031C2F is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.049 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.014 away. White text reads best on it, at 17.34:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.34:1 |
Values
| HEX | #031C2F |
| RGB | rgb(3, 28, 47) |
| HSL | hsl(206, 88%, 10%) |
| OKLCH | oklch(21.8% 0.049 244.4) |
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 #031C2F | 17.34:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #031C2F | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #031C2F text on white | 17.34:1 | AAA | Lc 104.0 | Preferred for body text |
| #031C2F 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A2C5E4
oklch(80.8% 0.058 245.3)
-
Step 400
400
#6DA7D6
oklch(70.7% 0.092 244.1)
-
Step 500
500
#4290CC
oklch(63.1% 0.119 244.6)
-
Step 600
600
#1A79B8
oklch(55.5% 0.128 244.3)
-
Step 700
700
#08669F
oklch(49.2% 0.119 244.3)
-
Step 800
800
#0F5381
oklch(42.7% 0.099 244.7)
-
Step 900
900
#174567
oklch(37.7% 0.076 244.4)
-
Step 950
950 (this color)
#031C2F
oklch(21.8% 0.049 244.4)
#031C2F 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) | #131D30 | 0.021 |
| Deuteranopia (no green cones) | #0C182F | 0.016 |
| Tritanopia (no blue cones) | #002123 | 0.035 |
| Achromatopsia (no color) | #1A1A1A | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031C2F
#031C2F
oklch(21.8% 0.049 244.4)
- #291400
#291400
oklch(21.7% 0.049 64.2)
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 #031C2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.014
- Dark #1B2431 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.053
- Rich Navy #001219 ΔE 0.054
- Navy Blue #001146 ΔE 0.059
- Jet #212529 ΔE 0.059
- Dark Navy #000435 ΔE 0.079
- Almost Black #070D0D ΔE 0.079
Use #031C2F 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.