#12243D
Closest named color: Oxford Blue (#1B263B). oklch(25.9% 0.053 256.9), rgb(18, 36, 61).
Aa
White text reads best on this color (15.60:1).
About this color
#12243D is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.053 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.016 away. White text reads best on it, at 15.60:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.60:1 |
Values
| HEX | #12243D |
| RGB | rgb(18, 36, 61) |
| HSL | hsl(215, 54%, 15%) |
| OKLCH | oklch(25.9% 0.053 256.9) |
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 #12243D | 15.60:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #12243D | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #12243D text on white | 15.60:1 | AAA | Lc 102.4 | Preferred for body text |
| #12243D text on black | 1.34:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBF1
oklch(88.6% 0.035 256.3)
-
Step 300
300
#A7C3EA
oklch(81% 0.063 256.7)
-
Step 400
400
#78A3DF
oklch(70.8% 0.1 256.8)
-
Step 500
500
#548AD6
oklch(63% 0.129 257.1)
-
Step 600
600
#3873C3
oklch(55.6% 0.139 256.8)
-
Step 700
700
#2A60A9
oklch(49.2% 0.13 256.9)
-
Step 800
800
#244F89
oklch(42.8% 0.108 256.7)
-
Step 900
900
#22426D
oklch(37.7% 0.083 256.4)
-
Step 950
950 (this color)
#12243D
oklch(25.9% 0.053 256.9)
#12243D 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) | #19263E | 0.012 |
| Deuteranopia (no green cones) | #14223C | 0.007 |
| Tritanopia (no blue cones) | #002A2D | 0.045 |
| Achromatopsia (no color) | #242424 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12243D
#12243D
oklch(25.9% 0.053 256.9)
- #322001
#322001
oklch(26% 0.053 77.3)
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 #12243D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.016
- Dark #1B2431 ΔE 0.025
- Jet #212529 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.052
- Gunmetal #293241 ΔE 0.061
- Marine #042E60 ΔE 0.067
- Navy Blue #001146 ΔE 0.069
Use #12243D 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.