#223A72
Closest named color: Twilight Blue (#0A437A). oklch(36.2% 0.101 264.5), rgb(34, 58, 114).
Aa
White text reads best on this color (10.95:1).
About this color
#223A72 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.101 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.030 away. White text reads best on it, at 10.95:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #223A72 |
| RGB | rgb(34, 58, 114) |
| HSL | hsl(222, 54%, 29%) |
| OKLCH | oklch(36.2% 0.101 264.5) |
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 #223A72 | 10.95:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #223A72 | 1.91:1 | Fails | Lc 8.8 | Not readable |
| #223A72 text on white | 10.95:1 | AAA | Lc 95.1 | Preferred for body text |
| #223A72 text on black | 1.91:1 | Fails | Lc -7.5 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CBD9F6
oklch(88.4% 0.043 265)
-
Step 300
300
#A8C1F2
oklch(80.9% 0.075 263.7)
-
Step 400
400
#7A9FEC
oklch(70.7% 0.121 264)
-
Step 500
500
#5985E6
oklch(63.2% 0.154 264.1)
-
Step 600
600
#406CD4
oklch(55.6% 0.168 264.4)
-
Step 700
700
#3259B8
oklch(49% 0.157 264.5)
-
Step 800
800
#2A4A95
oklch(42.8% 0.129 264.3)
-
Step 900
900 (this color)
#223A72
oklch(36.2% 0.101 264.5)
-
Step 950
950
#162545
oklch(27% 0.063 263.8)
#223A72 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) | #1D4074 | 0.017 |
| Deuteranopia (no green cones) | #0D3971 | 0.019 |
| Tritanopia (no blue cones) | #004750 | 0.083 |
| Achromatopsia (no color) | #3C3C3C | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223A72
#223A72
oklch(36.2% 0.101 264.5)
- #503A00
#503A00
oklch(36.3% 0.074 84.6)
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 #223A72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.030
- Marine Blue #01386A ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.049
- Marine #042E60 ΔE 0.057
- Cobalt #1E488F ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.061
- Light Navy #155084 ΔE 0.066
- Dark Blue Grey #1F3B4D ΔE 0.067
Use #223A72 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.