#021833
Closest named color: Rich Black (#0D1B2A). oklch(20.9% 0.061 254), rgb(2, 24, 51).
Aa
White text reads best on this color (17.78:1).
About this color
#021833 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.061 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 17.78:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.78:1 |
Values
| HEX | #021833 |
| RGB | rgb(2, 24, 51) |
| HSL | hsl(213, 92%, 10%) |
| OKLCH | oklch(20.9% 0.061 254) |
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 #021833 | 17.78:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #021833 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #021833 text on white | 17.78:1 | AAA | Lc 104.3 | Preferred for body text |
| #021833 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
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#A1C4EF
oklch(81% 0.072 253.8)
-
Step 400
400
#6CA4E7
oklch(70.8% 0.115 253.7)
-
Step 500
500
#428BE0
oklch(63.1% 0.148 254)
-
Step 600
600
#1D73CE
oklch(55.6% 0.161 254.1)
-
Step 700
700
#0E60B2
oklch(49.1% 0.149 254)
-
Step 800
800
#114F90
oklch(42.7% 0.123 253.9)
-
Step 900
900
#174273
oklch(37.7% 0.096 254.1)
-
Step 950
950 (this color)
#021833
oklch(20.9% 0.061 254)
#021833 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 | 0.014 |
| Deuteranopia (no green cones) | #021632 | 0.007 |
| Tritanopia (no blue cones) | #001F22 | 0.048 |
| Achromatopsia (no color) | #181818 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #021833
#021833
oklch(20.9% 0.061 254)
- #241400
#241400
oklch(20.8% 0.044 72.7)
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 #021833, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Navy Blue #001146 ΔE 0.043
- Rich Navy #001219 ΔE 0.055
- Dark #1B2431 ΔE 0.059
- Dark Navy #000435 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.063
- Night Blue #040348 ΔE 0.065
- Very Dark Blue #000133 ΔE 0.073
Use #021833 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.