#042255
Closest named color: Marine (#042E60). oklch(26.7% 0.099 260.2), rgb(4, 34, 85).
Aa
White text reads best on this color (15.38:1).
About this color
#042255 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.099 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.040 away. White text reads best on it, at 15.38:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.36:1 |
| White text | 15.38:1 |
Values
| HEX | #042255 |
| RGB | rgb(4, 34, 85) |
| HSL | hsl(218, 91%, 17%) |
| OKLCH | oklch(26.7% 0.099 260.2) |
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 #042255 | 15.38:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #042255 | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #042255 text on white | 15.38:1 | AAA | Lc 101.9 | Preferred for body text |
| #042255 text on black | 1.36:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFF
oklch(93.6% 0.031 258.9)
-
Step 200
200
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3983FF
oklch(63.1% 0.199 260.2)
-
Step 600
600
#0066F6
oklch(55.6% 0.23 260.3)
-
Step 700
700
#0055D0
oklch(49% 0.203 260.3)
-
Step 800
800
#0046AD
oklch(42.8% 0.176 260.1)
-
Step 900
900
#003992
oklch(37.6% 0.156 260.3)
-
Step 950
950 (this color)
#042255
oklch(26.7% 0.099 260.2)
#042255 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) | #002957 | 0.021 |
| Deuteranopia (no green cones) | #002154 | 0.006 |
| Tritanopia (no blue cones) | #002F37 | 0.077 |
| Achromatopsia (no color) | #252525 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042255
#042255
oklch(26.7% 0.099 260.2)
- #342200
#342200
oklch(26.7% 0.056 79.3)
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 #042255, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.040
- Midnight Blue #191970 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.057
- Navy Blue #001146 ΔE 0.057
- Darkblue #030764 ΔE 0.060
- Dark Indigo #1F0954 ΔE 0.061
- Dark Royal Blue #02066F ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.068
Use #042255 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.