#031C30
Closest named color: Rich Black (#0D1B2A). oklch(21.9% 0.05 245.7), rgb(3, 28, 48).
Aa
White text reads best on this color (17.31:1).
About this color
#031C30 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.050 and its hue 246°. 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 17.31:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.31:1 |
Values
| HEX | #031C30 |
| RGB | rgb(3, 28, 48) |
| HSL | hsl(207, 88%, 10%) |
| OKLCH | oklch(21.9% 0.05 245.7) |
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 #031C30 | 17.31:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #031C30 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #031C30 text on white | 17.31:1 | AAA | Lc 104.0 | Preferred for body text |
| #031C30 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A1C5E5
oklch(80.8% 0.06 245.5)
-
Step 400
400
#6DA7D8
oklch(70.8% 0.094 245.2)
-
Step 500
500
#4290CE
oklch(63.2% 0.121 245.4)
-
Step 600
600
#1979BB
oklch(55.7% 0.132 245.3)
-
Step 700
700
#0665A1
oklch(49% 0.123 245.6)
-
Step 800
800
#0E5383
oklch(42.8% 0.102 245.6)
-
Step 900
900
#164569
oklch(37.8% 0.079 245.5)
-
Step 950
950 (this color)
#031C30
oklch(21.9% 0.05 245.7)
#031C30 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) | #131D31 | 0.021 |
| Deuteranopia (no green cones) | #0C1930 | 0.014 |
| Tritanopia (no blue cones) | #002123 | 0.036 |
| Achromatopsia (no color) | #1A1A1A | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031C30
#031C30
oklch(21.9% 0.05 245.7)
- #291500
#291500
oklch(21.9% 0.048 66.7)
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 #031C30, 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
- Oxford Blue #1B263B ΔE 0.052
- Rich Navy #001219 ΔE 0.056
- Navy Blue #001146 ΔE 0.057
- Jet #212529 ΔE 0.059
- Dark Navy #000435 ΔE 0.078
- Almost Black #070D0D ΔE 0.080
Use #031C30 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.