#1D1B3A
Closest named color: Oxford Blue (#1B263B). oklch(24.2% 0.058 284.1), rgb(29, 27, 58).
Aa
White text reads best on this color (16.53:1).
About this color
#1D1B3A is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.058 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.036 away. White text reads best on it, at 16.53:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.27:1 |
| White text | 16.53:1 |
Values
| HEX | #1D1B3A |
| RGB | rgb(29, 27, 58) |
| HSL | hsl(244, 36%, 17%) |
| OKLCH | oklch(24.2% 0.058 284.1) |
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 #1D1B3A | 16.53:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #1D1B3A | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #1D1B3A text on white | 16.53:1 | AAA | Lc 103.4 | Preferred for body text |
| #1D1B3A 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D5D6F2
oklch(88.4% 0.038 284)
-
Step 300
300
#BBBBEC
oklch(80.9% 0.069 284.8)
-
Step 400
400
#9897E3
oklch(70.7% 0.11 283.8)
-
Step 500
500
#817BDA
oklch(63.1% 0.14 284.5)
-
Step 600
600
#6B62C8
oklch(55.5% 0.153 284.2)
-
Step 700
700
#5A51AD
oklch(49.2% 0.142 284.3)
-
Step 800
800
#49438C
oklch(42.7% 0.117 284)
-
Step 900
900
#3D3970
oklch(37.7% 0.092 284.4)
-
Step 950
950 (this color)
#1D1B3A
oklch(24.2% 0.058 284.1)
#1D1B3A 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) | #0F203B | 0.025 |
| Deuteranopia (no green cones) | #0E1E39 | 0.024 |
| Tritanopia (no blue cones) | #142127 | 0.049 |
| Achromatopsia (no color) | #1F1F1F | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1B3A
#1D1B3A
oklch(24.2% 0.058 284.1)
- #242100
#242100
oklch(24.3% 0.052 104.6)
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 #1D1B3A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.036
- Dark #1B2431 ΔE 0.039
- Rich Black #0D1B2A ΔE 0.042
- Jet #212529 ΔE 0.054
- Navy Blue #001146 ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.066
- Midnight Purple #280137 ΔE 0.067
Use #1D1B3A 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.