#223187
Closest named color: Twilight Blue (#0A437A). oklch(36% 0.144 269.9), rgb(34, 49, 135).
Aa
White text reads best on this color (11.30:1).
About this color
#223187 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 0.056 away. White text reads best on it, at 11.30:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #223187 |
| RGB | rgb(34, 49, 135) |
| HSL | hsl(231, 60%, 33%) |
| OKLCH | oklch(36% 0.144 269.9) |
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 #223187 | 11.30:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #223187 | 1.85:1 | Fails | Lc 8.3 | Not readable |
| #223187 text on white | 11.30:1 | AAA | Lc 95.6 | Preferred for body text |
| #223187 text on black | 1.85:1 | 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 900.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
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
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#425AFC
oklch(55.5% 0.24 269.9)
-
Step 700
700
#3548DC
oklch(49% 0.223 269.8)
-
Step 800
800
#2C3DB2
oklch(42.8% 0.185 269.9)
-
Step 900
900 (this color)
#223187
oklch(36% 0.144 269.9)
-
Step 950
950
#162152
oklch(27.1% 0.09 269.8)
#223187 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) | #003F8A | 0.038 |
| Deuteranopia (no green cones) | #003685 | 0.026 |
| Tritanopia (no blue cones) | #004757 | 0.114 |
| Achromatopsia (no color) | #3A3A3A | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223187
#223187
oklch(36% 0.144 269.9)
- #4C3B00
#4C3B00
oklch(36.1% 0.074 90.5)
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 #223187, closest first.
No curated palette has a color within ΔE 0.04 of #223187.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.056
- Marine Blue #01386A ΔE 0.060
- Cobalt #1E488F ΔE 0.061
- Royal #0C1793 ΔE 0.062
- Sapphire #2138AB ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.069
- Midnight Blue #191970 ΔE 0.072
- Blueberry #464196 ΔE 0.075
Use #223187 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.