#02243B
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.058 243.2), rgb(2, 36, 59).
Aa
White text reads best on this color (15.93:1).
About this color
#02243B is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.058 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.030 away. White text reads best on it, at 15.93:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.93:1 |
Values
| HEX | #02243B |
| RGB | rgb(2, 36, 59) |
| HSL | hsl(204, 93%, 12%) |
| OKLCH | oklch(25% 0.058 243.2) |
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 #02243B | 15.93:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #02243B | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #02243B text on white | 15.93:1 | AAA | Lc 102.6 | Preferred for body text |
| #02243B text on black | 1.31:1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C4DDF1
oklch(88.5% 0.038 242.2)
-
Step 300
300
#9BC6EA
oklch(80.8% 0.069 244)
-
Step 400
400
#5FA8E0
oklch(70.7% 0.11 243.4)
-
Step 500
500
#2491D7
oklch(63.1% 0.14 243.1)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950 (this color)
#02243B
oklch(25% 0.058 243.2)
#02243B 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) | #19253C | 0.026 |
| Deuteranopia (no green cones) | #11203B | 0.018 |
| Tritanopia (no blue cones) | #002A2C | 0.041 |
| Achromatopsia (no color) | #222222 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #02243B
#02243B
oklch(25% 0.058 243.2)
- #341A00
#341A00
oklch(24.9% 0.057 62.6)
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 #02243B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.030
- Dark #1B2431 ΔE 0.033
- Rich Black #0D1B2A ΔE 0.040
- Jet #212529 ΔE 0.050
- Navy Blue #001146 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.065
- Gunmetal #293241 ΔE 0.072
- Marine #042E60 ΔE 0.072
Use #02243B 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.