#1B2341
Closest named color: Oxford Blue (#1B263B). oklch(26.5% 0.057 270.8), rgb(27, 35, 65).
Aa
White text reads best on this color (15.40:1).
About this color
#1B2341 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.057 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.017 away. White text reads best on it, at 15.40:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.40:1 |
Values
| HEX | #1B2341 |
| RGB | rgb(27, 35, 65) |
| HSL | hsl(227, 41%, 18%) |
| OKLCH | oklch(26.5% 0.057 270.8) |
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 #1B2341 | 15.40:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #1B2341 | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #1B2341 text on white | 15.40:1 | AAA | Lc 102.2 | Preferred for body text |
| #1B2341 text on black | 1.36:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F3
oklch(88.5% 0.038 272.5)
-
Step 300
300
#B0BFED
oklch(80.9% 0.067 270.7)
-
Step 400
400
#879DE5
oklch(70.8% 0.109 270.5)
-
Step 500
500
#6B83DD
oklch(63.2% 0.138 270.8)
-
Step 600
600
#536ACA
oklch(55.5% 0.15 270.7)
-
Step 700
700
#4458AF
oklch(49.1% 0.14 270.7)
-
Step 800
800
#38488E
oklch(42.6% 0.117 271)
-
Step 900
900
#303D71
oklch(37.6% 0.09 271)
-
Step 950
950 (this color)
#1B2341
oklch(26.5% 0.057 270.8)
#1B2341 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) | #172642 | 0.010 |
| Deuteranopia (no green cones) | #132340 | 0.012 |
| Tritanopia (no blue cones) | #0A292E | 0.051 |
| Achromatopsia (no color) | #252525 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2341
#1B2341
oklch(26.5% 0.057 270.8)
- #2F2400
#2F2400
oklch(26.6% 0.054 91.5)
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 #1B2341, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.017
- Dark #1B2431 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.045
- Jet #212529 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.055
- Gunmetal #293241 ΔE 0.058
- Marine #042E60 ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.065
Use #1B2341 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.