#023555
Closest named color: Prussian Blue (#1D3557). oklch(31.6% 0.076 243.5), rgb(2, 53, 85).
Aa
White text reads best on this color (12.78:1).
About this color
#023555 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.076 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.022 away. White text reads best on it, at 12.78:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.78:1 |
Values
| HEX | #023555 |
| RGB | rgb(2, 53, 85) |
| HSL | hsl(203, 95%, 17%) |
| OKLCH | oklch(31.6% 0.076 243.5) |
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 #023555 | 12.78:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #023555 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #023555 text on white | 12.78:1 | AAA | Lc 98.5 | Preferred for body text |
| #023555 text on black | 1.64:1 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECFA
oklch(93.5% 0.026 244.4)
-
Step 200
200
#BEDEF8
oklch(88.6% 0.049 242.8)
-
Step 300
300
#8EC8F6
oklch(81% 0.089 243.1)
-
Step 400
400
#41A9F2
oklch(70.7% 0.143 243.3)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABC
oklch(55.7% 0.136 243.3)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950 (this color)
#023555
oklch(31.6% 0.076 243.5)
#023555 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) | #263656 | 0.033 |
| Deuteranopia (no green cones) | #1A2F54 | 0.024 |
| Tritanopia (no blue cones) | #003D41 | 0.051 |
| Achromatopsia (no color) | #323232 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023555
#023555
oklch(31.6% 0.076 243.5)
- #4B2800
#4B2800
oklch(31.6% 0.072 62.7)
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 #023555, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.022
- Midnight Green #073B4C ΔE 0.029
- Marine #042E60 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.037
- Marine Blue #01386A ΔE 0.037
- Gunmetal #293241 ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.061
Use #023555 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.