#042544
Closest named color: Oxford Blue (#1B263B). oklch(26.1% 0.069 250.9), rgb(4, 37, 68).
Aa
White text reads best on this color (15.51:1).
About this color
#042544 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.069 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.030 away. White text reads best on it, at 15.51:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.35:1 |
| White text | 15.51:1 |
Values
| HEX | #042544 |
| RGB | rgb(4, 37, 68) |
| HSL | hsl(209, 89%, 14%) |
| OKLCH | oklch(26.1% 0.069 250.9) |
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 #042544 | 15.51:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #042544 | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #042544 text on white | 15.51:1 | AAA | Lc 102.2 | Preferred for body text |
| #042544 text on black | 1.35:1 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C4DCF7
oklch(88.5% 0.045 251.4)
-
Step 300
300
#99C5F4
oklch(80.9% 0.082 250.5)
-
Step 400
400
#5DA5EF
oklch(70.7% 0.131 250.8)
-
Step 500
500
#248CEA
oklch(63.1% 0.168 251)
-
Step 600
600
#0075CD
oklch(55.6% 0.161 250.9)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#004379
oklch(37.8% 0.109 250.7)
-
Step 950
950 (this color)
#042544
oklch(26.1% 0.069 250.9)
#042544 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) | #162745 | 0.020 |
| Deuteranopia (no green cones) | #0B2143 | 0.013 |
| Tritanopia (no blue cones) | #002C31 | 0.049 |
| Achromatopsia (no color) | #242424 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042544
#042544
oklch(26.1% 0.069 250.9)
- #351F00
#351F00
oklch(26.2% 0.056 71.5)
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 #042544, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.030
- Dark #1B2431 ΔE 0.042
- Rich Black #0D1B2A ΔE 0.054
- Marine #042E60 ΔE 0.056
- Jet #212529 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.060
- Navy Blue #001146 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.068
Use #042544 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.