#031828
Closest named color: Rich Black (#0D1B2A). oklch(20.1% 0.043 243.4), rgb(3, 24, 40).
Aa
White text reads best on this color (18.02:1).
About this color
#031828 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.043 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.019 away. White text reads best on it, at 18.02:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.02:1 |
Values
| HEX | #031828 |
| RGB | rgb(3, 24, 40) |
| HSL | hsl(206, 86%, 8%) |
| OKLCH | oklch(20.1% 0.043 243.4) |
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 #031828 | 18.02:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #031828 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #031828 text on white | 18.02:1 | AAA | Lc 104.6 | Preferred for body text |
| #031828 text on black | 1.16:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5DF
oklch(80.9% 0.05 242.9)
-
Step 400
400
#74A7CF
oklch(70.8% 0.08 242.8)
-
Step 500
500
#4D90C3
oklch(63.1% 0.103 243.5)
-
Step 600
600
#2C79B0
oklch(55.5% 0.113 243.8)
-
Step 700
700
#1E6697
oklch(49.1% 0.104 243.4)
-
Step 800
800
#1C537A
oklch(42.6% 0.086 243.6)
-
Step 900
900
#1E4563
oklch(37.7% 0.068 244.3)
-
Step 950
950 (this color)
#031828
oklch(20.1% 0.043 243.4)
#031828 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) | #111829 | 0.020 |
| Deuteranopia (no green cones) | #0B1528 | 0.014 |
| Tritanopia (no blue cones) | #001C1E | 0.029 |
| Achromatopsia (no color) | #161616 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031828
#031828
oklch(20.1% 0.043 243.4)
- #241101
#241101
oklch(20.1% 0.044 62.3)
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 #031828, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.019
- Rich Navy #001219 ΔE 0.036
- Dark #1B2431 ΔE 0.059
- Almost Black #070D0D ΔE 0.061
- Navy Blue #001146 ΔE 0.064
- Jet #212529 ΔE 0.069
- Oxford Blue #1B263B ΔE 0.069
- Dark Navy #000435 ΔE 0.071
Use #031828 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.