#1D1D3F
Closest named color: Oxford Blue (#1B263B). oklch(25.1% 0.063 280.9), rgb(29, 29, 63).
Aa
White text reads best on this color (16.15:1).
About this color
#1D1D3F is a dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.063 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.032 away. White text reads best on it, at 16.15:1.
| Hue family | Purples |
| Lightness | dark (25%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.15:1 |
Values
| HEX | #1D1D3F |
| RGB | rgb(29, 29, 63) |
| HSL | hsl(240, 37%, 18%) |
| OKLCH | oklch(25.1% 0.063 280.9) |
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 #1D1D3F | 16.15:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1D1D3F | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #1D1D3F text on white | 16.15:1 | AAA | Lc 103.0 | Preferred for body text |
| #1D1D3F 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F9
oklch(93.7% 0.022 280.3)
-
Step 200
200
#D4D7F5
oklch(88.6% 0.041 281)
-
Step 300
300
#B7BCF1
oklch(81% 0.075 280.4)
-
Step 400
400
#9397E9
oklch(70.6% 0.119 280.7)
-
Step 500
500
#7B7BE3
oklch(63.1% 0.153 281.1)
-
Step 600
600
#6562D0
oklch(55.6% 0.165 280.8)
-
Step 700
700
#5450B5
oklch(49.1% 0.155 280.8)
-
Step 800
800
#454292
oklch(42.7% 0.128 281.2)
-
Step 900
900
#393975
oklch(37.7% 0.1 280.5)
-
Step 950
950 (this color)
#1D1D3F
oklch(25.1% 0.063 280.9)
#1D1D3F 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) | #0F2240 | 0.024 |
| Deuteranopia (no green cones) | #0C1F3E | 0.025 |
| Tritanopia (no blue cones) | #11242B | 0.053 |
| Achromatopsia (no color) | #212121 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1D3F
#1D1D3F
oklch(25.1% 0.063 280.9)
- #272200
#272200
oklch(25% 0.052 101.3)
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 #1D1D3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.032
- Dark #1B2431 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.049
- Jet #212529 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.060
- Dark Indigo #1F0954 ΔE 0.060
- Navy Blue #001146 ΔE 0.062
- Dark Purple #35063E ΔE 0.069
Use #1D1D3F 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.