#223F85
Closest named color: Cobalt (#1E488F). oklch(38.8% 0.123 264.4), rgb(34, 63, 133).
Aa
White text reads best on this color (9.91:1).
About this color
#223F85 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.123 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 9.91:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.11:1 |
| White text | 9.91:1 |
Values
| HEX | #223F85 |
| RGB | rgb(34, 63, 133) |
| HSL | hsl(222, 59%, 33%) |
| OKLCH | oklch(38.8% 0.123 264.4) |
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 #223F85 | 9.91:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #223F85 | 2.11:1 | Fails | Lc 11.3 | Not readable |
| #223F85 text on white | 9.91:1 | AAA | Lc 92.6 | Preferred for body text |
| #223F85 text on black | 2.11:1 | Fails | Lc -9.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8D9FC
oklch(88.4% 0.052 264.8)
-
Step 300
300
#A3C0FD
oklch(80.9% 0.092 264.7)
-
Step 400
400
#729DFC
oklch(70.7% 0.147 264.5)
-
Step 500
500
#4E81FA
oklch(63.1% 0.189 264.4)
-
Step 600
600
#3467E9
oklch(55.7% 0.205 264.4)
-
Step 700
700
#2754CA
oklch(49% 0.19 264.4)
-
Step 800
800
#2146A4
oklch(42.8% 0.158 264.4)
-
Step 900
900 (this color)
#223F85
oklch(38.8% 0.123 264.4)
-
Step 950
950
#13244C
oklch(27.1% 0.077 264.5)
#223F85 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) | #134888 | 0.026 |
| Deuteranopia (no green cones) | #003F84 | 0.022 |
| Tritanopia (no blue cones) | #00505B | 0.099 |
| Achromatopsia (no color) | #434343 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223F85
#223F85
oklch(38.8% 0.123 264.4)
- #584000
#584000
oklch(38.7% 0.079 84.4)
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 #223F85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Twilight Blue #0A437A ΔE 0.028
- Light Navy #155084 ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.054
- Blueberry #464196 ΔE 0.058
- Marine Blue #01386A ΔE 0.058
- Dusk Blue #26538D ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.062
Use #223F85 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.