#1B2136
Closest named color: Dark (#1B2431). oklch(25.3% 0.041 271.1), rgb(27, 33, 54).
Aa
White text reads best on this color (15.94:1).
About this color
#1B2136 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.041 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.016 away. White text reads best on it, at 15.94:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.31:1 |
| White text | 15.94:1 |
Values
| HEX | #1B2136 |
| RGB | rgb(27, 33, 54) |
| HSL | hsl(227, 33%, 16%) |
| OKLCH | oklch(25.3% 0.041 271.1) |
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 #1B2136 | 15.94:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #1B2136 | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #1B2136 text on white | 15.94:1 | AAA | Lc 102.9 | Preferred for body text |
| #1B2136 text on black | 1.31:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B5C0E1
oklch(81% 0.048 270.8)
-
Step 400
400
#8F9ED2
oklch(70.7% 0.078 271.8)
-
Step 500
500
#7386C6
oklch(63.1% 0.099 270.7)
-
Step 600
600
#5C6FB2
oklch(55.7% 0.107 270.6)
-
Step 700
700
#4C5C99
oklch(49% 0.1 271.2)
-
Step 800
800
#3E4C7C
oklch(42.8% 0.082 270.3)
-
Step 900
900
#353F64
oklch(37.6% 0.065 271.5)
-
Step 950
950 (this color)
#1B2136
oklch(25.3% 0.041 271.1)
#1B2136 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) | #1A2337 | 0.007 |
| Deuteranopia (no green cones) | #172136 | 0.006 |
| Tritanopia (no blue cones) | #122529 | 0.035 |
| Achromatopsia (no color) | #222222 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2136
#1B2136
oklch(25.3% 0.041 271.1)
- #2A2109
#2A2109
oklch(25.2% 0.04 88.6)
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 #1B2136, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.016
- Oxford Blue #1B263B ΔE 0.018
- Jet #212529 ΔE 0.034
- Rich Black #0D1B2A ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.053
- Gunmetal #293241 ΔE 0.064
- Navy Blue #001146 ΔE 0.075
- Prussian Blue #1D3557 ΔE 0.081
Use #1B2136 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.