#1D183D
Closest named color: Oxford Blue (#1B263B). oklch(23.8% 0.068 286.2), rgb(29, 24, 61).
Aa
White text reads best on this color (16.79:1).
About this color
#1D183D is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.068 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.046 away. White text reads best on it, at 16.79:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.25:1 |
| White text | 16.79:1 |
Values
| HEX | #1D183D |
| RGB | rgb(29, 24, 61) |
| HSL | hsl(248, 44%, 17%) |
| OKLCH | oklch(23.8% 0.068 286.2) |
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 #1D183D | 16.79:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #1D183D | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #1D183D text on white | 16.79:1 | AAA | Lc 103.6 | Preferred for body text |
| #1D183D text on black | 1.25:1 | 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
#F5F5FD
oklch(97.2% 0.011 286.2)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D6D5F6
oklch(88.4% 0.045 286.8)
-
Step 300
300
#BCB9F3
oklch(80.8% 0.081 286.8)
-
Step 400
400
#9A93ED
oklch(70.6% 0.13 286.1)
-
Step 500
500
#8476E7
oklch(63.1% 0.165 286.3)
-
Step 600
600
#6F5CD5
oklch(55.7% 0.179 286.3)
-
Step 700
700
#5D4AB9
oklch(49.1% 0.168 286.3)
-
Step 800
800
#4C3E96
oklch(42.8% 0.139 286.3)
-
Step 900
900
#3E3677
oklch(37.7% 0.107 285.7)
-
Step 950
950 (this color)
#1D183D
oklch(23.8% 0.068 286.2)
#1D183D 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) | #061E3E | 0.035 |
| Deuteranopia (no green cones) | #061C3C | 0.034 |
| Tritanopia (no blue cones) | #132027 | 0.058 |
| Achromatopsia (no color) | #1D1D1D | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D183D
#1D183D
oklch(23.8% 0.068 286.2)
- #222000
#222000
oklch(23.8% 0.051 106.3)
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 #1D183D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.046
- Rich Black #0D1B2A ΔE 0.049
- Dark #1B2431 ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.053
- Navy Blue #001146 ΔE 0.055
- Midnight Purple #280137 ΔE 0.059
- Very Dark Purple #2A0134 ΔE 0.062
- Dark Purple #35063E ΔE 0.062
Use #1D183D 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.