#023359
Closest named color: Marine (#042E60). oklch(31.4% 0.083 248.4), rgb(2, 51, 89).
Aa
White text reads best on this color (12.96:1).
About this color
#023359 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.083 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.021 away. White text reads best on it, at 12.96:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.62:1 |
| White text | 12.96:1 |
Values
| HEX | #023359 |
| RGB | rgb(2, 51, 89) |
| HSL | hsl(206, 96%, 18%) |
| OKLCH | oklch(31.4% 0.083 248.4) |
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 #023359 | 12.96:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #023359 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #023359 text on white | 12.96:1 | AAA | Lc 98.7 | Preferred for body text |
| #023359 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DCECFD
oklch(93.6% 0.029 249.8)
-
Step 200
200
#BEDDFC
oklch(88.5% 0.054 248.4)
-
Step 300
300
#8DC6FE
oklch(80.8% 0.099 248.7)
-
Step 400
400
#41A6FD
oklch(70.6% 0.158 248.3)
-
Step 500
500
#008EEB
oklch(63.2% 0.171 248.3)
-
Step 600
600
#0077C6
oklch(55.6% 0.15 248.2)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#004475
oklch(37.8% 0.103 248.3)
-
Step 950
950 (this color)
#023359
oklch(31.4% 0.083 248.4)
#023359 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) | #20355B | 0.027 |
| Deuteranopia (no green cones) | #122E58 | 0.017 |
| Tritanopia (no blue cones) | #003C41 | 0.059 |
| Achromatopsia (no color) | #313131 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023359
#023359
oklch(31.4% 0.083 248.4)
- #472900
#472900
oklch(31.2% 0.068 68.1)
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 #023359, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.024
- Marine Blue #01386A ΔE 0.032
- Midnight Green #073B4C ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.046
- Gunmetal #293241 ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.062
Use #023359 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.