#1B2956
Closest named color: Marine (#042E60). oklch(29.6% 0.083 268), rgb(27, 41, 86).
Aa
White text reads best on this color (14.01:1).
About this color
#1B2956 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.083 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.027 away. White text reads best on it, at 14.01:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.49:1 |
| White text | 14.01:1 |
Values
| HEX | #1B2956 |
| RGB | rgb(27, 41, 86) |
| HSL | hsl(226, 52%, 22%) |
| OKLCH | oklch(29.6% 0.083 268) |
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 #1B2956 | 14.01:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #1B2956 | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #1B2956 text on white | 14.01:1 | AAA | Lc 100.5 | Preferred for body text |
| #1B2956 text on black | 1.49:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#789BFF
oklch(70.8% 0.152 267.9)
-
Step 500
500
#577DFF
oklch(63.1% 0.197 268)
-
Step 600
600
#3E61F1
oklch(55.6% 0.219 267.9)
-
Step 700
700
#324FD2
oklch(49.2% 0.204 268.1)
-
Step 800
800
#2942AA
oklch(42.8% 0.169 268)
-
Step 900
900
#243986
oklch(37.6% 0.132 267.9)
-
Step 950
950 (this color)
#1B2956
oklch(29.6% 0.083 268)
#1B2956 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) | #122F58 | 0.019 |
| Deuteranopia (no green cones) | #062955 | 0.021 |
| Tritanopia (no blue cones) | #00333B | 0.070 |
| Achromatopsia (no color) | #2C2C2C | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2956
#1B2956
oklch(29.6% 0.083 268)
- #392A00
#392A00
oklch(29.4% 0.06 87.6)
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 #1B2956, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.027
- Prussian Blue #1D3557 ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.049
- Marine Blue #01386A ΔE 0.053
- Gunmetal #293241 ΔE 0.057
- Midnight Blue #191970 ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.065
Use #1B2956 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.