#1B1B46
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.079 279.1), rgb(27, 27, 70).
Aa
White text reads best on this color (16.25:1).
About this color
#1B1B46 is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.079 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.044 away. White text reads best on it, at 16.25:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.25:1 |
Values
| HEX | #1B1B46 |
| RGB | rgb(27, 27, 70) |
| HSL | hsl(240, 44%, 19%) |
| OKLCH | oklch(25% 0.079 279.1) |
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 #1B1B46 | 16.25:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1B1B46 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #1B1B46 text on white | 16.25:1 | AAA | Lc 103.0 | Preferred for body text |
| #1B1B46 text on black | 1.29:1 | 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
#E5E8FC
oklch(93.5% 0.027 279.1)
-
Step 200
200
#D1D6FC
oklch(88.4% 0.053 279.4)
-
Step 300
300
#B3BBFC
oklch(80.9% 0.092 278.7)
-
Step 400
400
#8E94FB
oklch(70.6% 0.149 279.3)
-
Step 500
500
#7576F9
oklch(63.2% 0.191 279.1)
-
Step 600
600
#605AE7
oklch(55.5% 0.206 279.2)
-
Step 700
700
#5049C9
oklch(49.1% 0.192 279.1)
-
Step 800
800
#413DA3
oklch(42.8% 0.159 279)
-
Step 900
900
#363581
oklch(37.6% 0.125 279.1)
-
Step 950
950 (this color)
#1B1B46
oklch(25% 0.079 279.1)
#1B1B46 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) | #022247 | 0.033 |
| Deuteranopia (no green cones) | #001F45 | 0.034 |
| Tritanopia (no blue cones) | #06252D | 0.069 |
| Achromatopsia (no color) | #202020 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B1B46
#1B1B46
oklch(25% 0.079 279.1)
- #282200
#282200
oklch(25.1% 0.052 99.5)
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 #1B1B46, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.044
- Dark Indigo #1F0954 ΔE 0.046
- Navy Blue #001146 ΔE 0.053
- Dark #1B2431 ΔE 0.054
- Rich Black #0D1B2A ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.068
- Dark Purple #35063E ΔE 0.070
- Marine #042E60 ΔE 0.070
Use #1B1B46 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.