#1A1B40
Closest named color: Oxford Blue (#1B263B). oklch(24.4% 0.069 278.8), rgb(26, 27, 64).
Aa
White text reads best on this color (16.47:1).
About this color
#1A1B40 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.069 and its hue 279°. 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 16.47:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.27:1 |
| White text | 16.47:1 |
Values
| HEX | #1A1B40 |
| RGB | rgb(26, 27, 64) |
| HSL | hsl(238, 42%, 18%) |
| OKLCH | oklch(24.4% 0.069 278.8) |
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 #1A1B40 | 16.47:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #1A1B40 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #1A1B40 text on white | 16.47:1 | AAA | Lc 103.3 | Preferred for body text |
| #1A1B40 text on black | 1.27:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F7
oklch(88.5% 0.044 278.4)
-
Step 300
300
#B5BCF5
oklch(81% 0.081 279)
-
Step 400
400
#8F97F0
oklch(70.7% 0.13 278.6)
-
Step 500
500
#767AEB
oklch(63.1% 0.167 279)
-
Step 600
600
#6060DA
oklch(55.6% 0.182 278.7)
-
Step 700
700
#504FBD
oklch(49.2% 0.168 278.6)
-
Step 800
800
#414199
oklch(42.7% 0.14 278.7)
-
Step 900
900
#373879
oklch(37.7% 0.108 279.2)
-
Step 950
950 (this color)
#1A1B40
oklch(24.4% 0.069 278.8)
#1A1B40 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) | #092141 | 0.027 |
| Deuteranopia (no green cones) | #051E3F | 0.028 |
| Tritanopia (no blue cones) | #0A232A | 0.060 |
| Achromatopsia (no color) | #1F1F1F | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A1B40
#1A1B40
oklch(24.4% 0.069 278.8)
- #262000
#262000
oklch(24.3% 0.05 99.1)
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 #1A1B40, 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 0.046
- Rich Black #0D1B2A ΔE 0.049
- Navy Blue #001146 ΔE 0.053
- Dark Indigo #1F0954 ΔE 0.054
- Jet #212529 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.068
- Midnight Purple #280137 ΔE 0.069
Use #1A1B40 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.