#042E4A
Closest named color: Oxford Blue (#1B263B). oklch(29% 0.067 243.9), rgb(4, 46, 74).
Aa
White text reads best on this color (14.04:1).
About this color
#042E4A is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.067 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.037 away. White text reads best on it, at 14.04:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.49:1 |
| White text | 14.04:1 |
Values
| HEX | #042E4A |
| RGB | rgb(4, 46, 74) |
| HSL | hsl(204, 90%, 15%) |
| OKLCH | oklch(29% 0.067 243.9) |
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 #042E4A | 14.04:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #042E4A | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #042E4A text on white | 14.04:1 | AAA | Lc 100.4 | Preferred for body text |
| #042E4A text on black | 1.49:1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DDECF9
oklch(93.6% 0.024 244.1)
-
Step 200
200
#C1DDF5
oklch(88.5% 0.045 244.2)
-
Step 300
300
#94C7F1
oklch(80.9% 0.08 243.8)
-
Step 400
400
#52A8EA
oklch(70.7% 0.128 244.3)
-
Step 500
500
#0091DF
oklch(63.2% 0.154 243.6)
-
Step 600
600
#0079BD
oklch(55.5% 0.138 244.2)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950 (this color)
#042E4A
oklch(29% 0.067 243.9)
#042E4A 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) | #212F4B | 0.030 |
| Deuteranopia (no green cones) | #172949 | 0.021 |
| Tritanopia (no blue cones) | #003538 | 0.047 |
| Achromatopsia (no color) | #2C2C2C | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042E4A
#042E4A
oklch(29% 0.067 243.9)
- #412300
#412300
oklch(29% 0.065 64.5)
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 #042E4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.037
- Marine #042E60 ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.041
- Midnight Green #073B4C ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.045
- Gunmetal #293241 ΔE 0.047
- Dark #1B2431 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.053
Use #042E4A 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.