#031833
Closest named color: Rich Black (#0D1B2A). oklch(21% 0.06 255), rgb(3, 24, 51).
Aa
White text reads best on this color (17.76:1).
About this color
#031833 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.060 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 17.76:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.76:1 |
Values
| HEX | #031833 |
| RGB | rgb(3, 24, 51) |
| HSL | hsl(214, 89%, 11%) |
| OKLCH | oklch(21% 0.06 255) |
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 #031833 | 17.76:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #031833 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #031833 text on white | 17.76:1 | AAA | Lc 104.3 | Preferred for body text |
| #031833 text on black | 1.18:1 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3EF
oklch(80.8% 0.072 255.7)
-
Step 400
400
#6EA3E7
oklch(70.6% 0.115 255.1)
-
Step 500
500
#468BDF
oklch(63.2% 0.145 254.7)
-
Step 600
600
#2473CD
oklch(55.7% 0.158 254.8)
-
Step 700
700
#1660B2
oklch(49.2% 0.148 255)
-
Step 800
800
#164E90
oklch(42.6% 0.123 255.4)
-
Step 900
900
#194273
oklch(37.8% 0.096 254.8)
-
Step 950
950 (this color)
#031833
oklch(21% 0.06 255)
#031833 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) | #0A1A34 | 0.012 |
| Deuteranopia (no green cones) | #021632 | 0.007 |
| Tritanopia (no blue cones) | #001E22 | 0.045 |
| Achromatopsia (no color) | #181818 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031833
#031833
oklch(21% 0.06 255)
- #241500
#241500
oklch(21.1% 0.044 75.5)
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 #031833, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Navy Blue #001146 ΔE 0.043
- Rich Navy #001219 ΔE 0.056
- Dark #1B2431 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.062
- Dark Navy #000435 ΔE 0.062
- Night Blue #040348 ΔE 0.065
- Jet #212529 ΔE 0.073
Use #031833 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.