#023A58
Closest named color: Midnight Green (#073B4C). oklch(33.2% 0.074 239.9), rgb(2, 58, 88).
Aa
White text reads best on this color (12.00:1).
About this color
#023A58 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.074 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.023 away. White text reads best on it, at 12.00:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.74:1 |
| White text | 12.00:1 |
Values
| HEX | #023A58 |
| RGB | rgb(2, 58, 88) |
| HSL | hsl(201, 96%, 18%) |
| OKLCH | oklch(33.2% 0.074 239.9) |
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 #023A58 | 12.00:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #023A58 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #023A58 text on white | 12.00:1 | AAA | Lc 97.0 | Preferred for body text |
| #023A58 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
#C7DCEC
oklch(88.4% 0.032 240.7)
-
Step 300
300
#A0C6E2
oklch(80.8% 0.057 240.3)
-
Step 400
400
#6BA8D3
oklch(70.7% 0.089 240.4)
-
Step 500
500
#3D92C7
oklch(63.1% 0.114 239.6)
-
Step 600
600
#0B7BB4
oklch(55.6% 0.124 239.9)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#05557E
oklch(42.9% 0.096 239.8)
-
Step 900
900 (this color)
#023A58
oklch(33.2% 0.074 239.9)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#023A58 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) | #2B3B59 | 0.037 |
| Deuteranopia (no green cones) | #203357 | 0.029 |
| Tritanopia (no blue cones) | #004245 | 0.049 |
| Achromatopsia (no color) | #363636 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023A58
#023A58
oklch(33.2% 0.074 239.9)
- #512B04
#512B04
oklch(33.2% 0.074 59.8)
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 #023A58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.023
- Prussian Blue #1D3557 ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.029
- Marine Blue #01386A ΔE 0.034
- Marine #042E60 ΔE 0.043
- Gunmetal #293241 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.054
- Charcoal #264653 ΔE 0.055
Use #023A58 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.