#031C33
Closest named color: Rich Black (#0D1B2A). oklch(22.1% 0.055 249), rgb(3, 28, 51).
Aa
White text reads best on this color (17.24:1).
About this color
#031C33 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.055 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.020 away. White text reads best on it, at 17.24:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.24:1 |
Values
| HEX | #031C33 |
| RGB | rgb(3, 28, 51) |
| HSL | hsl(209, 89%, 11%) |
| OKLCH | oklch(22.1% 0.055 249) |
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 #031C33 | 17.24:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #031C33 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #031C33 text on white | 17.24:1 | AAA | Lc 103.9 | Preferred for body text |
| #031C33 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#A1C5E9
oklch(81% 0.064 248.6)
-
Step 400
400
#6BA6DF
oklch(70.8% 0.104 248.7)
-
Step 500
500
#408ED6
oklch(63.1% 0.133 249.2)
-
Step 600
600
#1677C3
oklch(55.7% 0.144 248.8)
-
Step 700
700
#0363A9
oklch(49.1% 0.135 249.4)
-
Step 800
800
#0C5188
oklch(42.6% 0.111 249.1)
-
Step 900
900
#15446D
oklch(37.7% 0.086 248.8)
-
Step 950
950 (this color)
#031C33
oklch(22.1% 0.055 249)
#031C33 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) | #111D34 | 0.018 |
| Deuteranopia (no green cones) | #091933 | 0.012 |
| Tritanopia (no blue cones) | #002225 | 0.040 |
| Achromatopsia (no color) | #1B1B1B | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031C33
#031C33
oklch(22.1% 0.055 249)
- #291600
#291600
oklch(22.1% 0.048 69.2)
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 #031C33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.020
- Dark #1B2431 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.051
- Navy Blue #001146 ΔE 0.052
- Rich Navy #001219 ΔE 0.060
- Jet #212529 ΔE 0.061
- Dark Navy #000435 ΔE 0.076
- Night Blue #040348 ΔE 0.076
Use #031C33 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.