#023657
Closest named color: Prussian Blue (#1D3557). oklch(32.1% 0.077 243.9), rgb(2, 54, 87).
Aa
White text reads best on this color (12.59:1).
About this color
#023657 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.077 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 12.59:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.59:1 |
Values
| HEX | #023657 |
| RGB | rgb(2, 54, 87) |
| HSL | hsl(203, 96%, 17%) |
| OKLCH | oklch(32.1% 0.077 243.9) |
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 #023657 | 12.59:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #023657 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #023657 text on white | 12.59:1 | AAA | Lc 98.1 | Preferred for body text |
| #023657 text on black | 1.66:1 | 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
#DCECFB
oklch(93.6% 0.027 246.3)
-
Step 200
200
#BEDEF9
oklch(88.6% 0.05 243.8)
-
Step 300
300
#8DC8F8
oklch(81% 0.091 243.8)
-
Step 400
400
#3EA9F4
oklch(70.7% 0.146 243.6)
-
Step 500
500
#0091DF
oklch(63.2% 0.154 243.6)
-
Step 600
600
#0079BD
oklch(55.5% 0.138 244.2)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950 (this color)
#023657
oklch(32.1% 0.077 243.9)
#023657 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) | #263758 | 0.033 |
| Deuteranopia (no green cones) | #1A3056 | 0.024 |
| Tritanopia (no blue cones) | #003E42 | 0.053 |
| Achromatopsia (no color) | #333333 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023657
#023657
oklch(32.1% 0.077 243.9)
- #4C2900
#4C2900
oklch(32% 0.073 63.3)
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 #023657, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Midnight Green #073B4C ΔE 0.029
- Marine #042E60 ΔE 0.032
- Marine Blue #01386A ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.036
- Gunmetal #293241 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.065
Use #023657 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.