#223288
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.144 269.6), rgb(34, 50, 136).
Aa
White text reads best on this color (11.17:1).
About this color
#223288 is a dark, vivid blue. In OKLCH its lightness is 36%, its chroma 0.144 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.054 away. White text reads best on it, at 11.17:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #223288 |
| RGB | rgb(34, 50, 136) |
| HSL | hsl(231, 60%, 33%) |
| OKLCH | oklch(36.3% 0.144 269.6) |
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 #223288 | 11.17:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #223288 | 1.87:1 | Fails | Lc 8.6 | Not readable |
| #223288 text on white | 11.17:1 | AAA | Lc 95.3 | Preferred for body text |
| #223288 text on black | 1.87:1 | Fails | Lc -7.4 | 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 900.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFF
oklch(93.7% 0.03 269.1)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#415AFD
oklch(55.6% 0.241 269.6)
-
Step 700
700
#3448DC
oklch(49% 0.224 269.6)
-
Step 800
800
#2B3DB2
oklch(42.7% 0.185 269.6)
-
Step 900
900 (this color)
#223288
oklch(36.3% 0.144 269.6)
-
Step 950
950
#152152
oklch(27% 0.091 269.1)
#223288 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) | #00408B | 0.038 |
| Deuteranopia (no green cones) | #003786 | 0.026 |
| Tritanopia (no blue cones) | #004858 | 0.114 |
| Achromatopsia (no color) | #3B3B3B | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223288
#223288
oklch(36.3% 0.144 269.6)
- #4D3B00
#4D3B00
oklch(36.2% 0.074 89.3)
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 #223288, closest first.
No curated palette has a color within ΔE 0.04 of #223288.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.054
- Cobalt #1E488F ΔE 0.058
- Sapphire #2138AB ΔE 0.060
- Marine Blue #01386A ΔE 0.061
- Royal #0C1793 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.067
- Blueberry #464196 ΔE 0.072
- Midnight Blue #191970 ΔE 0.075
Use #223288 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.