#042B53
Closest named color: Marine (#042E60). oklch(28.9% 0.084 253.3), rgb(4, 43, 83).
Aa
White text reads best on this color (14.23:1).
About this color
#042B53 is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.084 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.024 away. White text reads best on it, at 14.23:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.47:1 |
| White text | 14.23:1 |
Values
| HEX | #042B53 |
| RGB | rgb(4, 43, 83) |
| HSL | hsl(210, 91%, 17%) |
| OKLCH | oklch(28.9% 0.084 253.3) |
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 #042B53 | 14.23:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #042B53 | 1.47:1 | Fails | Lc 0.0 | Not readable |
| #042B53 text on white | 14.23:1 | AAA | Lc 100.6 | Preferred for body text |
| #042B53 text on black | 1.47:1 | 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
#DDEBFD
oklch(93.5% 0.029 254.7)
-
Step 200
200
#C0DCFE
oklch(88.5% 0.056 253.4)
-
Step 300
300
#93C4FF
oklch(80.8% 0.099 253.5)
-
Step 400
400
#52A3FF
oklch(70.7% 0.157 253.4)
-
Step 500
500
#0089FB
oklch(63.1% 0.196 253.2)
-
Step 600
600
#0073D4
oklch(55.6% 0.172 253.1)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#004E95
oklch(42.6% 0.134 253.6)
-
Step 900
900
#00417D
oklch(37.6% 0.117 253.3)
-
Step 950
950 (this color)
#042B53
oklch(28.9% 0.084 253.3)
#042B53 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) | #162E55 | 0.020 |
| Deuteranopia (no green cones) | #052752 | 0.012 |
| Tritanopia (no blue cones) | #00353A | 0.064 |
| Achromatopsia (no color) | #2B2B2B | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042B53
#042B53
oklch(28.9% 0.084 253.3)
- #3D2500
#3D2500
oklch(28.8% 0.061 72.7)
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 #042B53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.024
- Prussian Blue #1D3557 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.047
- Marine Blue #01386A ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.055
- Midnight Green #073B4C ΔE 0.058
- Gunmetal #293241 ΔE 0.061
- Dark #1B2431 ΔE 0.064
Use #042B53 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.