#21184B
Closest named color: Dark Indigo (#1F0954). oklch(25.4% 0.09 286.1), rgb(33, 24, 75).
Aa
White text reads best on this color (16.19:1).
About this color
#21184B is a dark, moderately saturated purple. In OKLCH its lightness is 25%, its chroma 0.090 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.035 away. White text reads best on it, at 16.19:1.
| Hue family | Purples |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.29:1 |
| White text | 16.19:1 |
Values
| HEX | #21184B |
| RGB | rgb(33, 24, 75) |
| HSL | hsl(251, 52%, 19%) |
| OKLCH | oklch(25.4% 0.09 286.1) |
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 #21184B | 16.19:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #21184B | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #21184B text on white | 16.19:1 | AAA | Lc 102.9 | Preferred for body text |
| #21184B 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E8E7FE
oklch(93.6% 0.031 287.8)
-
Step 200
200
#D5D4FF
oklch(88.5% 0.059 286.2)
-
Step 300
300
#BBB7FF
oklch(80.9% 0.101 286.5)
-
Step 400
400
#9A8EFF
oklch(70.6% 0.161 286.3)
-
Step 500
500
#846CFF
oklch(63% 0.209 286.2)
-
Step 600
600
#714AF4
oklch(55.6% 0.238 286.3)
-
Step 700
700
#5F39D4
oklch(49% 0.221 286.2)
-
Step 800
800
#4D31AC
oklch(42.7% 0.184 286.1)
-
Step 900
900
#3F2E88
oklch(37.7% 0.143 286)
-
Step 950
950 (this color)
#21184B
oklch(25.4% 0.09 286.1)
#21184B 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) | #00224D | 0.047 |
| Deuteranopia (no green cones) | #001F4A | 0.045 |
| Tritanopia (no blue cones) | #11242E | 0.076 |
| Achromatopsia (no color) | #212121 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21184B
#21184B
oklch(25.4% 0.09 286.1)
- #262400
#262400
oklch(25.4% 0.054 106.6)
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 #21184B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.035
- Oxford Blue #1B263B ΔE 0.056
- Dark Purple #35063E ΔE 0.060
- Navy Blue #001146 ΔE 0.060
- Midnight Purple #280137 ΔE 0.065
- Deep Purple #36013F ΔE 0.066
- Dark #1B2431 ΔE 0.067
- Midnight Blue #191970 ΔE 0.069
Use #21184B 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.