#221F53
Closest named color: Dark Indigo (#1F0954). oklch(27.6% 0.092 281.1), rgb(34, 31, 83).
Aa
White text reads best on this color (15.11:1).
About this color
#221F53 is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.092 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.049 away. White text reads best on it, at 15.11:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.38:1 |
| White text | 15.11:1 |
Values
| HEX | #221F53 |
| RGB | rgb(34, 31, 83) |
| HSL | hsl(243, 46%, 22%) |
| OKLCH | oklch(27.6% 0.092 281.1) |
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 #221F53 | 15.11:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #221F53 | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #221F53 text on white | 15.11:1 | AAA | Lc 101.8 | Preferred for body text |
| #221F53 text on black | 1.38:1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E6E8FF
oklch(93.6% 0.031 281.8)
-
Step 200
200
#D2D5FF
oklch(88.4% 0.058 281.9)
-
Step 300
300
#B5B9FF
oklch(80.8% 0.099 281.4)
-
Step 400
400
#9192FF
oklch(70.7% 0.157 281.2)
-
Step 500
500
#7972FF
oklch(63.2% 0.203 281.1)
-
Step 600
600
#654EF9
oklch(55.6% 0.241 281.2)
-
Step 700
700
#553DD9
oklch(49.1% 0.224 281.3)
-
Step 800
800
#4534AF
oklch(42.7% 0.185 281.4)
-
Step 900
900
#39308B
oklch(37.8% 0.145 281.4)
-
Step 950
950 (this color)
#221F53
oklch(27.6% 0.092 281.1)
#221F53 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) | #002855 | 0.042 |
| Deuteranopia (no green cones) | #002452 | 0.040 |
| Tritanopia (no blue cones) | #0C2B35 | 0.079 |
| Achromatopsia (no color) | #262626 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #221F53
#221F53
oklch(27.6% 0.092 281.1)
- #2E2800
#2E2800
oklch(27.5% 0.057 100.7)
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 #221F53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.049
- Marine #042E60 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.054
- Midnight Blue #191970 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.065
- Dark #1B2431 ΔE 0.070
- Navy Blue #001146 ΔE 0.074
Use #221F53 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.