#1B263D
Closest named color: Oxford Blue (#1B263B). oklch(27% 0.046 264.1), rgb(27, 38, 61).
Aa
White text reads best on this color (15.09:1).
About this color
#1B263D is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.046 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.004 away. White text reads best on it, at 15.09:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.09:1 |
Values
| HEX | #1B263D |
| RGB | rgb(27, 38, 61) |
| HSL | hsl(221, 39%, 17%) |
| OKLCH | oklch(27% 0.046 264.1) |
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 #1B263D | 15.09:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #1B263D | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #1B263D text on white | 15.09:1 | AAA | Lc 101.9 | Preferred for body text |
| #1B263D text on black | 1.39:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#AFC1E5
oklch(80.9% 0.055 264.2)
-
Step 400
400
#85A0D7
oklch(70.6% 0.087 264.1)
-
Step 500
500
#6788CD
oklch(63.2% 0.111 264)
-
Step 600
600
#4F71BA
oklch(55.7% 0.12 264)
-
Step 700
700
#405EA0
oklch(49.1% 0.112 264.3)
-
Step 800
800
#354D82
oklch(42.8% 0.093 264.4)
-
Step 900
900
#2E4068
oklch(37.6% 0.073 264.8)
-
Step 950
950 (this color)
#1B263D
oklch(27% 0.046 264.1)
#1B263D 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) | #1D283E | 0.008 |
| Deuteranopia (no green cones) | #1A253C | 0.004 |
| Tritanopia (no blue cones) | #0D2B2E | 0.042 |
| Achromatopsia (no color) | #262626 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B263D
#1B263D
oklch(27% 0.046 264.1)
- #312409
#312409
oklch(26.9% 0.045 82.8)
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 #1B263D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.004
- Dark #1B2431 ΔE 0.022
- Space Cadet #2B2D42 ΔE 0.037
- Jet #212529 ΔE 0.038
- Gunmetal #293241 ΔE 0.048
- Rich Black #0D1B2A ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.062
- Marine #042E60 ΔE 0.065
Use #1B263D 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.