#042949
Closest named color: Oxford Blue (#1B263B). oklch(27.5% 0.072 249.6), rgb(4, 41, 73).
Aa
White text reads best on this color (14.80:1).
About this color
#042949 is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.072 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.032 away. White text reads best on it, at 14.80:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.41:1 |
| White text | 14.80:1 |
Values
| HEX | #042949 |
| RGB | rgb(4, 41, 73) |
| HSL | hsl(208, 90%, 15%) |
| OKLCH | oklch(27.5% 0.072 249.6) |
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 #042949 | 14.80:1 | AAA | Lc -104.2 | Preferred for body text |
| Black text on #042949 | 1.41:1 | Fails | Lc 0.0 | Not readable |
| #042949 text on white | 14.80:1 | AAA | Lc 101.3 | Preferred for body text |
| #042949 text on black | 1.41:1 | 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
#DEECFA
oklch(93.7% 0.024 248.1)
-
Step 200
200
#C2DCF8
oklch(88.4% 0.048 250.3)
-
Step 300
300
#96C5F6
oklch(80.8% 0.086 250)
-
Step 400
400
#57A6F1
oklch(70.7% 0.135 249.2)
-
Step 500
500
#0C8DEC
oklch(63.1% 0.172 249.3)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950 (this color)
#042949
oklch(27.5% 0.072 249.6)
#042949 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) | #192B4A | 0.022 |
| Deuteranopia (no green cones) | #0E2548 | 0.014 |
| Tritanopia (no blue cones) | #003135 | 0.053 |
| Achromatopsia (no color) | #282828 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042949
#042949
oklch(27.5% 0.072 249.6)
- #3A2100
#3A2100
oklch(27.4% 0.06 68.9)
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 #042949, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.032
- Marine #042E60 ΔE 0.043
- Dark #1B2431 ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.053
- Gunmetal #293241 ΔE 0.059
- Midnight Green #073B4C ΔE 0.061
- Jet #212529 ΔE 0.063
Use #042949 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.