#1B1D46
Closest named color: Oxford Blue (#1B263B). oklch(25.5% 0.075 277.5), rgb(27, 29, 70).
Aa
White text reads best on this color (16.02:1).
About this color
#1B1D46 is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.075 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.039 away. White text reads best on it, at 16.02:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 16.02:1 |
Values
| HEX | #1B1D46 |
| RGB | rgb(27, 29, 70) |
| HSL | hsl(237, 44%, 19%) |
| OKLCH | oklch(25.5% 0.075 277.5) |
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 #1B1D46 | 16.02:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #1B1D46 | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #1B1D46 text on white | 16.02:1 | AAA | Lc 102.8 | Preferred for body text |
| #1B1D46 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D1D7FA
oklch(88.6% 0.049 277.7)
-
Step 300
300
#B2BCFA
oklch(81% 0.088 277.1)
-
Step 400
400
#8C96F8
oklch(70.7% 0.143 277.7)
-
Step 500
500
#7278F5
oklch(63.1% 0.183 277.7)
-
Step 600
600
#5D5DE3
oklch(55.5% 0.198 277.8)
-
Step 700
700
#4D4CC6
oklch(49.2% 0.185 277.5)
-
Step 800
800
#3F3FA0
oklch(42.7% 0.153 277.7)
-
Step 900
900
#34377F
oklch(37.7% 0.119 277.2)
-
Step 950
950 (this color)
#1B1D46
oklch(25.5% 0.075 277.5)
#1B1D46 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) | #072347 | 0.028 |
| Deuteranopia (no green cones) | #022045 | 0.030 |
| Tritanopia (no blue cones) | #06262E | 0.065 |
| Achromatopsia (no color) | #212121 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B1D46
#1B1D46
oklch(25.5% 0.075 277.5)
- #2A2300
#2A2300
oklch(25.6% 0.053 98)
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 #1B1D46, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.039
- Dark #1B2431 ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.051
- Navy Blue #001146 ΔE 0.057
- Rich Black #0D1B2A ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.063
- Marine #042E60 ΔE 0.066
- Jet #212529 ΔE 0.068
Use #1B1D46 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.