#221739
Closest named color: Oxford Blue (#1B263B). oklch(23.8% 0.064 296.2), rgb(34, 23, 57).
Aa
White text reads best on this color (16.80:1).
About this color
#221739 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.064 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.048 away. White text reads best on it, at 16.80:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.24:1 |
| White text | 16.80:1 |
Values
| HEX | #221739 |
| RGB | rgb(34, 23, 57) |
| HSL | hsl(259, 43%, 16%) |
| OKLCH | oklch(23.8% 0.064 296.2) |
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 #221739 | 16.80:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #221739 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #221739 text on white | 16.80:1 | AAA | Lc 103.6 | Preferred for body text |
| #221739 text on black | 1.24:1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F7
oklch(93.6% 0.022 297.4)
-
Step 200
200
#DBD4F2
oklch(88.5% 0.041 296.2)
-
Step 300
300
#C4B7EC
oklch(80.8% 0.075 295.9)
-
Step 400
400
#A890E3
oklch(70.7% 0.121 296.5)
-
Step 500
500
#9372DB
oklch(63% 0.155 296.2)
-
Step 600
600
#7E58C8
oklch(55.5% 0.168 296.1)
-
Step 700
700
#6B48AD
oklch(49.2% 0.155 296.2)
-
Step 800
800
#573B8C
oklch(42.6% 0.129 296.4)
-
Step 900
900
#473470
oklch(37.7% 0.1 295.8)
-
Step 950
950 (this color)
#221739
oklch(23.8% 0.064 296.2)
#221739 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) | #0A1D3A | 0.040 |
| Deuteranopia (no green cones) | #0D1D38 | 0.038 |
| Tritanopia (no blue cones) | #1D1E25 | 0.051 |
| Achromatopsia (no color) | #1D1D1D | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #221739
#221739
oklch(23.8% 0.064 296.2)
- #1E2200
#1E2200
oklch(24% 0.055 116)
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 #221739, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.048
- Dark #1B2431 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.050
- Midnight Purple #280137 ΔE 0.053
- Dark Purple #35063E ΔE 0.054
- Very Dark Purple #2A0134 ΔE 0.055
- Eggplant #380835 ΔE 0.057
- Dark Indigo #1F0954 ΔE 0.060
Use #221739 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.