#1F1B41
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.07 285), rgb(31, 27, 65).
Aa
White text reads best on this color (16.26:1).
About this color
#1F1B41 is a very dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.070 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.039 away. White text reads best on it, at 16.26:1.
| Hue family | Purples |
| Lightness | very dark (25%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.26:1 |
Values
| HEX | #1F1B41 |
| RGB | rgb(31, 27, 65) |
| HSL | hsl(246, 41%, 18%) |
| OKLCH | oklch(25% 0.07 285) |
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 #1F1B41 | 16.26:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1F1B41 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #1F1B41 text on white | 16.26:1 | AAA | Lc 103.1 | Preferred for body text |
| #1F1B41 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D5D6F7
oklch(88.6% 0.045 284.1)
-
Step 300
300
#BABAF4
oklch(80.9% 0.081 284.4)
-
Step 400
400
#9994EF
oklch(70.8% 0.131 285)
-
Step 500
500
#8176EA
oklch(63.1% 0.169 284.8)
-
Step 600
600
#6C5CD8
oklch(55.7% 0.183 284.6)
-
Step 700
700
#5B4ABB
oklch(49% 0.171 285.1)
-
Step 800
800
#4A3E97
oklch(42.7% 0.14 284.9)
-
Step 900
900
#3D3679
oklch(37.8% 0.11 284.5)
-
Step 950
950 (this color)
#1F1B41
oklch(25% 0.07 285)
#1F1B41 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) | #092142 | 0.033 |
| Deuteranopia (no green cones) | #081F40 | 0.033 |
| Tritanopia (no blue cones) | #14232B | 0.058 |
| Achromatopsia (no color) | #202020 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1B41
#1F1B41
oklch(25% 0.07 285)
- #262300
#262300
oklch(25.1% 0.053 104.8)
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 #1F1B41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.039
- Dark #1B2431 ΔE 0.047
- Dark Indigo #1F0954 ΔE 0.053
- Rich Black #0D1B2A ΔE 0.055
- Navy Blue #001146 ΔE 0.061
- Dark Purple #35063E ΔE 0.063
- Jet #212529 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.064
Use #1F1B41 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.