#1F1B47
Closest named color: Oxford Blue (#1B263B). oklch(25.5% 0.079 283.3), rgb(31, 27, 71).
Aa
White text reads best on this color (16.07:1).
About this color
#1F1B47 is a dark, moderately saturated purple. In OKLCH its lightness is 25%, its chroma 0.079 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.045 away. White text reads best on it, at 16.07:1.
| Hue family | Purples |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.07:1 |
Values
| HEX | #1F1B47 |
| RGB | rgb(31, 27, 71) |
| HSL | hsl(245, 45%, 19%) |
| OKLCH | oklch(25.5% 0.079 283.3) |
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 #1F1B47 | 16.07:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #1F1B47 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #1F1B47 text on white | 16.07:1 | AAA | Lc 102.9 | Preferred for body text |
| #1F1B47 text on black | 1.30:1 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E7E8FC
oklch(93.6% 0.027 283.6)
-
Step 200
200
#D4D5FB
oklch(88.4% 0.052 284.1)
-
Step 300
300
#B8B9FC
oklch(80.9% 0.094 283.4)
-
Step 400
400
#9592FB
oklch(70.8% 0.151 283.1)
-
Step 500
500
#7E72F8
oklch(63.1% 0.193 283.4)
-
Step 600
600
#6956E7
oklch(55.6% 0.21 283.1)
-
Step 700
700
#5845C8
oklch(49% 0.194 283.2)
-
Step 800
800
#483AA2
oklch(42.7% 0.161 283.4)
-
Step 900
900
#3B3381
oklch(37.6% 0.127 283.1)
-
Step 950
950 (this color)
#1F1B47
oklch(25.5% 0.079 283.3)
#1F1B47 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) | #022348 | 0.040 |
| Deuteranopia (no green cones) | #002046 | 0.040 |
| Tritanopia (no blue cones) | #10252E | 0.067 |
| Achromatopsia (no color) | #212121 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1B47
#1F1B47
oklch(25.5% 0.079 283.3)
- #272400
#272400
oklch(25.5% 0.054 104.9)
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 #1F1B47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.045
- Dark Indigo #1F0954 ΔE 0.045
- Dark #1B2431 ΔE 0.056
- Navy Blue #001146 ΔE 0.059
- Dark Purple #35063E ΔE 0.064
- Rich Black #0D1B2A ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.065
- Midnight Purple #280137 ΔE 0.069
Use #1F1B47 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.