#1B244C
Closest named color: Oxford Blue (#1B263B). oklch(27.6% 0.074 271.2), rgb(27, 36, 76).
Aa
White text reads best on this color (14.96:1).
About this color
#1B244C is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.074 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.034 away. White text reads best on it, at 14.96:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.40:1 |
| White text | 14.96:1 |
Values
| HEX | #1B244C |
| RGB | rgb(27, 36, 76) |
| HSL | hsl(229, 48%, 20%) |
| OKLCH | oklch(27.6% 0.074 271.2) |
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 #1B244C | 14.96:1 | AAA | Lc -104.5 | Preferred for body text |
| Black text on #1B244C | 1.40:1 | Fails | Lc 0.0 | Not readable |
| #1B244C text on white | 14.96:1 | AAA | Lc 101.7 | Preferred for body text |
| #1B244C text on black | 1.40:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ACBEFA
oklch(80.9% 0.087 271.4)
-
Step 400
400
#819AF8
oklch(70.7% 0.141 271.2)
-
Step 500
500
#637DF5
oklch(63% 0.181 271.2)
-
Step 600
600
#4D63E4
oklch(55.7% 0.196 271.2)
-
Step 700
700
#3F51C6
oklch(49.2% 0.182 271.4)
-
Step 800
800
#3343A0
oklch(42.7% 0.151 271.1)
-
Step 900
900
#2C3A7F
oklch(37.7% 0.117 271.1)
-
Step 950
950 (this color)
#1B244C
oklch(27.6% 0.074 271.2)
#1B244C 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) | #11294D | 0.018 |
| Deuteranopia (no green cones) | #09254B | 0.020 |
| Tritanopia (no blue cones) | #002D34 | 0.066 |
| Achromatopsia (no color) | #272727 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B244C
#1B244C
oklch(27.6% 0.074 271.2)
- #322600
#322600
oklch(27.5% 0.056 90.7)
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 #1B244C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.034
- Marine #042E60 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.047
- Dark #1B2431 ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.055
- Gunmetal #293241 ΔE 0.060
- Dark Indigo #1F0954 ΔE 0.065
- Jet #212529 ΔE 0.067
Use #1B244C 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.