#223774
Closest named color: Marine Blue (#01386A). oklch(35.6% 0.108 266.6), rgb(34, 55, 116).
Aa
White text reads best on this color (11.24:1).
About this color
#223774 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.108 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.032 away. White text reads best on it, at 11.24:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #223774 |
| RGB | rgb(34, 55, 116) |
| HSL | hsl(225, 55%, 29%) |
| OKLCH | oklch(35.6% 0.108 266.6) |
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 #223774 | 11.24:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #223774 | 1.86:1 | Fails | Lc 8.2 | Not readable |
| #223774 text on white | 11.24:1 | AAA | Lc 95.7 | Preferred for body text |
| #223774 text on black | 1.86:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CBD9F8
oklch(88.5% 0.045 266.2)
-
Step 300
300
#A9C0F6
oklch(81% 0.081 266.7)
-
Step 400
400
#7B9DF2
oklch(70.7% 0.131 266.6)
-
Step 500
500
#5B82ED
oklch(63.1% 0.166 266.6)
-
Step 600
600
#4369DB
oklch(55.6% 0.18 266.6)
-
Step 700
700
#3556BE
oklch(49% 0.168 266.8)
-
Step 800
800
#2C479A
oklch(42.6% 0.139 266.8)
-
Step 900
900 (this color)
#223774
oklch(35.6% 0.108 266.6)
-
Step 950
950
#172448
oklch(27% 0.069 266.8)
#223774 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) | #143F76 | 0.024 |
| Deuteranopia (no green cones) | #003773 | 0.026 |
| Tritanopia (no blue cones) | #004550 | 0.088 |
| Achromatopsia (no color) | #3B3B3B | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223774
#223774
oklch(35.6% 0.108 266.6)
- #4D3900
#4D3900
oklch(35.7% 0.073 86.5)
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 #223774, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.032
- Twilight Blue #0A437A ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.051
- Marine #042E60 ΔE 0.054
- Cobalt #1E488F ΔE 0.062
- Dark Grey Blue #29465B ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.072
- Dark Blue Grey #1F3B4D ΔE 0.073
Use #223774 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.