#1D1B38
Closest named color: Oxford Blue (#1B263B). oklch(24.1% 0.054 284.7), rgb(29, 27, 56).
Aa
White text reads best on this color (16.58:1).
About this color
#1D1B38 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.054 and its hue 285°. 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 16.58:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.26:1 |
| White text | 16.58:1 |
Values
| HEX | #1D1B38 |
| RGB | rgb(29, 27, 56) |
| HSL | hsl(244, 35%, 16%) |
| OKLCH | oklch(24.1% 0.054 284.7) |
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 #1D1B38 | 16.58:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #1D1B38 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #1D1B38 text on white | 16.58:1 | AAA | Lc 103.5 | Preferred for body text |
| #1D1B38 text on black | 1.26:1 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E8F6
oklch(93.5% 0.019 286)
-
Step 200
200
#D6D6F1
oklch(88.4% 0.037 285.6)
-
Step 300
300
#BBBCE9
oklch(81% 0.063 283.9)
-
Step 400
400
#9997DF
oklch(70.6% 0.104 284.7)
-
Step 500
500
#827CD5
oklch(63% 0.132 285)
-
Step 600
600
#6C64C3
oklch(55.7% 0.143 284.5)
-
Step 700
700
#5A52A8
oklch(49% 0.133 284.6)
-
Step 800
800
#4A4488
oklch(42.8% 0.11 284.8)
-
Step 900
900
#3D3A6D
oklch(37.7% 0.085 284.2)
-
Step 950
950 (this color)
#1D1B38
oklch(24.1% 0.054 284.7)
#1D1B38 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) | #101F39 | 0.023 |
| Deuteranopia (no green cones) | #0F1E37 | 0.023 |
| Tritanopia (no blue cones) | #152126 | 0.047 |
| Achromatopsia (no color) | #1E1E1E | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1B38
#1D1B38
oklch(24.1% 0.054 284.7)
- #232000
#232000
oklch(23.9% 0.051 104.5)
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 #1D1B38, 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 0.036
- Rich Black #0D1B2A ΔE 0.039
- Jet #212529 ΔE 0.052
- Navy Blue #001146 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.066
- Dark Indigo #1F0954 ΔE 0.067
- Midnight Purple #280137 ΔE 0.068
Use #1D1B38 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.