#223E59
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.5% 0.058 249), rgb(34, 62, 89).
Aa
White text reads best on this color (11.04:1).
About this color
#223E59 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.058 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.022 away. White text reads best on it, at 11.04:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.90:1 |
| White text | 11.04:1 |
Values
| HEX | #223E59 |
| RGB | rgb(34, 62, 89) |
| HSL | hsl(209, 45%, 24%) |
| OKLCH | oklch(35.5% 0.058 249) |
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 #223E59 | 11.04:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #223E59 | 1.90:1 | Fails | Lc 8.5 | Not readable |
| #223E59 text on white | 11.04:1 | AAA | Lc 95.4 | Preferred for body text |
| #223E59 text on black | 1.90:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE9
oklch(88.5% 0.025 248.1)
-
Step 300
300
#ABC4DC
oklch(80.9% 0.044 247.3)
-
Step 400
400
#7FA5CB
oklch(70.8% 0.07 248.8)
-
Step 500
500
#5D8EBD
oklch(63.1% 0.089 248.4)
-
Step 600
600
#4277AA
oklch(55.5% 0.098 249.2)
-
Step 700
700
#346492
oklch(49.1% 0.091 249.3)
-
Step 800
800
#2C5276
oklch(42.8% 0.074 248.8)
-
Step 900
900 (this color)
#223E59
oklch(35.5% 0.058 249)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#223E59 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) | #333F5A | 0.023 |
| Deuteranopia (no green cones) | #2B3A58 | 0.015 |
| Tritanopia (no blue cones) | #004447 | 0.049 |
| Achromatopsia (no color) | #3C3C3C | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223E59
#223E59
oklch(35.5% 0.058 249)
- #503617
#503617
oklch(35.6% 0.058 68.7)
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 #223E59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.022
- Dark Grey Blue #29465B ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.030
- Charcoal #264653 ΔE 0.032
- Midnight Green #073B4C ΔE 0.035
- Onyx #343A40 ΔE 0.046
- Marine Blue #01386A ΔE 0.046
- Gunmetal #293241 ΔE 0.050
Use #223E59 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.