#223F67
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.078 256.8), rgb(34, 63, 103).
Aa
White text reads best on this color (10.63:1).
About this color
#223F67 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.078 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.035 away. White text reads best on it, at 10.63:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #223F67 |
| RGB | rgb(34, 63, 103) |
| HSL | hsl(215, 50%, 27%) |
| OKLCH | oklch(36.6% 0.078 256.8) |
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 #223F67 | 10.63:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #223F67 | 1.97:1 | Fails | Lc 9.4 | Not readable |
| #223F67 text on white | 10.63:1 | AAA | Lc 94.5 | Preferred for body text |
| #223F67 text on black | 1.97:1 | Fails | Lc -8.1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAEF
oklch(88.4% 0.033 258.4)
-
Step 300
300
#A9C3E7
oklch(81% 0.058 256.6)
-
Step 400
400
#7BA3DB
oklch(70.8% 0.094 256.9)
-
Step 500
500
#588BD1
oklch(63.2% 0.12 256.6)
-
Step 600
600
#3D73BE
oklch(55.5% 0.131 257.1)
-
Step 700
700
#2F60A4
oklch(49% 0.122 257.2)
-
Step 800
800
#284F85
oklch(42.7% 0.1 257)
-
Step 900
900 (this color)
#223F67
oklch(36.6% 0.078 256.8)
-
Step 950
950
#16273E
oklch(27% 0.049 256.3)
#223F67 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) | #2E4269 | 0.019 |
| Deuteranopia (no green cones) | #243B66 | 0.012 |
| Tritanopia (no blue cones) | #00484E | 0.064 |
| Achromatopsia (no color) | #3E3E3E | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223F67
#223F67
oklch(36.6% 0.078 256.8)
- #553800
#553800
oklch(36.5% 0.077 76.5)
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 #223F67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.036
- Marine Blue #01386A ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.046
- Charcoal #264653 ΔE 0.047
- Midnight Green #073B4C ΔE 0.055
- Marine #042E60 ΔE 0.063
Use #223F67 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.