#023A57
Closest named color: Midnight Green (#073B4C). oklch(33.2% 0.073 239), rgb(2, 58, 87).
Aa
White text reads best on this color (12.03:1).
About this color
#023A57 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.073 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.021 away. White text reads best on it, at 12.03:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.74:1 |
| White text | 12.03:1 |
Values
| HEX | #023A57 |
| RGB | rgb(2, 58, 87) |
| HSL | hsl(200, 96%, 17%) |
| OKLCH | oklch(33.2% 0.073 239) |
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 #023A57 | 12.03:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #023A57 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #023A57 text on white | 12.03:1 | AAA | Lc 97.1 | Preferred for body text |
| #023A57 text on black | 1.74:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A1C6E1
oklch(80.9% 0.055 240)
-
Step 400
400
#6BA8D2
oklch(70.6% 0.088 239.8)
-
Step 500
500
#3D92C6
oklch(63.1% 0.113 239.1)
-
Step 600
600
#0C7BB2
oklch(55.5% 0.122 239.1)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#05557C
oklch(42.7% 0.093 238.5)
-
Step 900
900 (this color)
#023A57
oklch(33.2% 0.073 239)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#023A57 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) | #2C3A58 | 0.038 |
| Deuteranopia (no green cones) | #213356 | 0.030 |
| Tritanopia (no blue cones) | #004144 | 0.047 |
| Achromatopsia (no color) | #363636 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023A57
#023A57
oklch(33.2% 0.073 239)
- #512B06
#512B06
oklch(33.2% 0.073 58.8)
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 #023A57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.028
- Marine Blue #01386A ΔE 0.036
- Marine #042E60 ΔE 0.044
- Gunmetal #293241 ΔE 0.050
- Charcoal #264653 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.054
Use #023A57 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.