#223151
Closest named color: Prussian Blue (#1D3557). oklch(31.7% 0.061 264.2), rgb(34, 49, 81).
Aa
White text reads best on this color (12.91:1).
About this color
#223151 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.061 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.015 away. White text reads best on it, at 12.91:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.62:1 |
| White text | 12.91:1 |
Values
| HEX | #223151 |
| RGB | rgb(34, 49, 81) |
| HSL | hsl(221, 41%, 23%) |
| OKLCH | oklch(31.7% 0.061 264.2) |
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 #223151 | 12.91:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #223151 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #223151 text on white | 12.91:1 | AAA | Lc 99.0 | Preferred for body text |
| #223151 text on black | 1.62:1 | 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 950.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF5
oklch(88.6% 0.04 263.7)
-
Step 300
300
#A9C1F0
oklch(80.9% 0.072 263.7)
-
Step 400
400
#7C9FE9
oklch(70.7% 0.116 264.3)
-
Step 500
500
#5B85E2
oklch(63% 0.148 264.3)
-
Step 600
600
#426DD0
oklch(55.6% 0.16 264.2)
-
Step 700
700
#345AB4
oklch(49% 0.149 264.4)
-
Step 800
800
#2B4A92
oklch(42.6% 0.124 264.3)
-
Step 900
900
#273F74
oklch(37.7% 0.096 264)
-
Step 950
950 (this color)
#223151
oklch(31.7% 0.061 264.2)
#223151 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) | #243452 | 0.010 |
| Deuteranopia (no green cones) | #1F3050 | 0.006 |
| Tritanopia (no blue cones) | #0A383D | 0.054 |
| Achromatopsia (no color) | #323232 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223151
#223151
oklch(31.7% 0.061 264.2)
- #402F05
#402F05
oklch(31.6% 0.061 84.9)
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 #223151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.015
- Space Cadet #2B2D42 ΔE 0.029
- Gunmetal #293241 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.035
- Marine #042E60 ΔE 0.041
- Midnight Green #073B4C ΔE 0.041
- Marine Blue #01386A ΔE 0.049
- Oxford Blue #1B263B ΔE 0.051
Use #223151 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.