#223C9E
Closest named color: Sapphire (#2138AB). oklch(40.3% 0.162 267.1), rgb(34, 60, 158).
Aa
White text reads best on this color (9.51:1).
About this color
#223C9E is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.162 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.023 away. White text reads best on it, at 9.51:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.20:1 |
| White text | 9.51:1 |
Values
| HEX | #223C9E |
| RGB | rgb(34, 60, 158) |
| HSL | hsl(227, 65%, 38%) |
| OKLCH | oklch(40.3% 0.162 267.1) |
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 #223C9E | 9.51:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #223C9E | 2.20:1 | Fails | Lc 12.6 | Not readable |
| #223C9E text on white | 9.51:1 | AAA | Lc 91.4 | Preferred for body text |
| #223C9E text on black | 2.20:1 | Fails | Lc -11.0 | 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 800.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FD
oklch(88.6% 0.052 267.4)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#557EFD
oklch(63% 0.194 267.2)
-
Step 600
600
#3D63EC
oklch(55.5% 0.211 267.2)
-
Step 700
700
#3051CD
oklch(49% 0.195 267.2)
-
Step 800
800 (this color)
#223C9E
oklch(40.3% 0.162 267.1)
-
Step 900
900
#243A84
oklch(37.7% 0.127 267.4)
-
Step 950
950
#15234D
oklch(27% 0.08 267.1)
#223C9E 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) | #004BA1 | 0.038 |
| Deuteranopia (no green cones) | #00409C | 0.021 |
| Tritanopia (no blue cones) | #005567 | 0.126 |
| Achromatopsia (no color) | #464646 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223C9E
#223C9E
oklch(40.3% 0.162 267.1)
- #5B4500
#5B4500
oklch(40.3% 0.082 87.8)
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 #223C9E, closest first.
No curated palette has a color within ΔE 0.04 of #223C9E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.023
- Cobalt #1E488F ΔE 0.041
- Blueberry #464196 ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.061
- Twilight Blue #0A437A ΔE 0.067
- Blue Blue #2242C7 ΔE 0.068
- Indigo Blue #3A18B1 ΔE 0.068
- Dusk Blue #26538D ΔE 0.071
Use #223C9E 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.