#042051
Closest named color: Marine (#042E60). oklch(25.9% 0.096 260.4), rgb(4, 32, 81).
Aa
White text reads best on this color (15.78:1).
About this color
#042051 is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.096 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.049 away. White text reads best on it, at 15.78:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.33:1 |
| White text | 15.78:1 |
Values
| HEX | #042051 |
| RGB | rgb(4, 32, 81) |
| HSL | hsl(218, 91%, 17%) |
| OKLCH | oklch(25.9% 0.096 260.4) |
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 #042051 | 15.78:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #042051 | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #042051 text on white | 15.78:1 | AAA | Lc 102.3 | Preferred for body text |
| #042051 text on black | 1.33:1 | 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
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3A83FF
oklch(63.1% 0.199 260.3)
-
Step 600
600
#0065F7
oklch(55.5% 0.232 260.5)
-
Step 700
700
#0055D2
oklch(49.1% 0.205 260.4)
-
Step 800
800
#0045AE
oklch(42.7% 0.178 260.4)
-
Step 900
900
#043A90
oklch(37.7% 0.152 260.4)
-
Step 950
950 (this color)
#042051
oklch(25.9% 0.096 260.4)
#042051 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) | #002653 | 0.018 |
| Deuteranopia (no green cones) | #001F50 | 0.006 |
| Tritanopia (no blue cones) | #002C35 | 0.072 |
| Achromatopsia (no color) | #232323 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042051
#042051
oklch(25.9% 0.096 260.4)
- #312000
#312000
oklch(25.8% 0.054 79.7)
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 #042051, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.049
- Navy Blue #001146 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.055
- Dark Indigo #1F0954 ΔE 0.058
- Darkblue #030764 ΔE 0.059
- Midnight Blue #191970 ΔE 0.061
- Dark #1B2431 ΔE 0.068
- Dark Royal Blue #02066F ΔE 0.069
Use #042051 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.