#1F1B3D
Closest named color: Oxford Blue (#1B263B). oklch(24.7% 0.063 286.2), rgb(31, 27, 61).
Aa
White text reads best on this color (16.37:1).
About this color
#1F1B3D is a very dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.063 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.037 away. White text reads best on it, at 16.37:1.
| Hue family | Purples |
| Lightness | very dark (25%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.37:1 |
Values
| HEX | #1F1B3D |
| RGB | rgb(31, 27, 61) |
| HSL | hsl(247, 39%, 17%) |
| OKLCH | oklch(24.7% 0.063 286.2) |
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 #1F1B3D | 16.37:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #1F1B3D | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #1F1B3D text on white | 16.37:1 | AAA | Lc 103.2 | Preferred for body text |
| #1F1B3D text on black | 1.28:1 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F4
oklch(88.5% 0.041 285.5)
-
Step 300
300
#BCBAEF
oklch(80.9% 0.074 286.3)
-
Step 400
400
#9B95E7
oklch(70.8% 0.118 286.3)
-
Step 500
500
#8478E0
oklch(63.1% 0.152 286.4)
-
Step 600
600
#6E5FCE
oklch(55.6% 0.165 285.9)
-
Step 700
700
#5D4DB2
oklch(49.1% 0.154 286.5)
-
Step 800
800
#4B4090
oklch(42.6% 0.127 285.9)
-
Step 900
900
#3E3773
oklch(37.6% 0.1 285.9)
-
Step 950
950 (this color)
#1F1B3D
oklch(24.7% 0.063 286.2)
#1F1B3D 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) | #0D203E | 0.029 |
| Deuteranopia (no green cones) | #0C1F3C | 0.030 |
| Tritanopia (no blue cones) | #162229 | 0.052 |
| Achromatopsia (no color) | #202020 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1B3D
#1F1B3D
oklch(24.7% 0.063 286.2)
- #242200
#242200
oklch(24.6% 0.053 106.4)
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 #1F1B3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.037
- Dark #1B2431 ΔE 0.042
- Rich Black #0D1B2A ΔE 0.049
- Jet #212529 ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.059
- Navy Blue #001146 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.064
- Dark Purple #35063E ΔE 0.064
Use #1F1B3D 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.