#031B35
Closest named color: Rich Black (#0D1B2A). oklch(22% 0.059 252.3), rgb(3, 27, 53).
Aa
White text reads best on this color (17.32:1).
About this color
#031B35 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.059 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 17.32:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.32:1 |
Values
| HEX | #031B35 |
| RGB | rgb(3, 27, 53) |
| HSL | hsl(211, 89%, 11%) |
| OKLCH | oklch(22% 0.059 252.3) |
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 #031B35 | 17.32:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #031B35 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #031B35 text on white | 17.32:1 | AAA | Lc 104.0 | Preferred for body text |
| #031B35 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DBF3
oklch(88.4% 0.04 253)
-
Step 300
300
#A0C4ED
oklch(80.8% 0.07 252)
-
Step 400
400
#6BA4E5
oklch(70.6% 0.113 252.6)
-
Step 500
500
#408CDD
oklch(63.1% 0.144 252.3)
-
Step 600
600
#1974CB
oklch(55.5% 0.157 252.5)
-
Step 700
700
#0661B0
oklch(49.1% 0.146 252.5)
-
Step 800
800
#0D508E
oklch(42.8% 0.12 252.1)
-
Step 900
900
#154371
oklch(37.7% 0.093 251.7)
-
Step 950
950 (this color)
#031B35
oklch(22% 0.059 252.3)
#031B35 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) | #0E1D36 | 0.016 |
| Deuteranopia (no green cones) | #051834 | 0.010 |
| Tritanopia (no blue cones) | #002125 | 0.043 |
| Achromatopsia (no color) | #1A1A1A | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031B35
#031B35
oklch(22% 0.059 252.3)
- #281600
#281600
oklch(22% 0.047 70.9)
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 #031B35, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Navy Blue #001146 ΔE 0.046
- Dark #1B2431 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.053
- Rich Navy #001219 ΔE 0.062
- Jet #212529 ΔE 0.065
- Night Blue #040348 ΔE 0.071
- Dark Navy #000435 ΔE 0.072
Use #031B35 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.