#1B2144
Closest named color: Oxford Blue (#1B263B). oklch(26.3% 0.066 273.7), rgb(27, 33, 68).
Aa
White text reads best on this color (15.58:1).
About this color
#1B2144 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.066 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.026 away. White text reads best on it, at 15.58:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.58:1 |
Values
| HEX | #1B2144 |
| RGB | rgb(27, 33, 68) |
| HSL | hsl(231, 43%, 19%) |
| OKLCH | oklch(26.3% 0.066 273.7) |
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 #1B2144 | 15.58:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #1B2144 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #1B2144 text on white | 15.58:1 | AAA | Lc 102.4 | Preferred for body text |
| #1B2144 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F6
oklch(88.6% 0.042 273.7)
-
Step 300
300
#B0BEF3
oklch(80.9% 0.077 273.1)
-
Step 400
400
#889AEE
oklch(70.7% 0.125 273.6)
-
Step 500
500
#6D7FE8
oklch(63.2% 0.158 273.7)
-
Step 600
600
#5665D6
oklch(55.5% 0.173 273.7)
-
Step 700
700
#4753BA
oklch(49.1% 0.161 273.9)
-
Step 800
800
#3A4596
oklch(42.7% 0.132 273.6)
-
Step 900
900
#313B78
oklch(37.8% 0.104 273.4)
-
Step 950
950 (this color)
#1B2144
oklch(26.3% 0.066 273.7)
#1B2144 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) | #122645 | 0.018 |
| Deuteranopia (no green cones) | #0D2243 | 0.019 |
| Tritanopia (no blue cones) | #07292F | 0.059 |
| Achromatopsia (no color) | #242424 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2144
#1B2144
oklch(26.3% 0.066 273.7)
- #2D2400
#2D2400
oklch(26.3% 0.054 94.9)
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 #1B2144, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.026
- Dark #1B2431 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.051
- Jet #212529 ΔE 0.057
- Rich Black #0D1B2A ΔE 0.057
- Marine #042E60 ΔE 0.061
- Dark Indigo #1F0954 ΔE 0.064
- Gunmetal #293241 ΔE 0.065
Use #1B2144 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.