#042343
Closest named color: Oxford Blue (#1B263B). oklch(25.4% 0.07 252.6), rgb(4, 35, 67).
Aa
White text reads best on this color (15.82:1).
About this color
#042343 is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.070 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.033 away. White text reads best on it, at 15.82:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.82:1 |
Values
| HEX | #042343 |
| RGB | rgb(4, 35, 67) |
| HSL | hsl(210, 89%, 14%) |
| OKLCH | oklch(25.4% 0.07 252.6) |
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 #042343 | 15.82:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #042343 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #042343 text on white | 15.82:1 | AAA | Lc 102.5 | Preferred for body text |
| #042343 text on black | 1.32:1 | 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
#C4DCF8
oklch(88.6% 0.047 252.4)
-
Step 300
300
#9AC4F5
oklch(80.8% 0.083 252.7)
-
Step 400
400
#60A4F1
oklch(70.7% 0.133 252.8)
-
Step 500
500
#2A8BEC
oklch(63.1% 0.17 252.5)
-
Step 600
600
#0073D2
oklch(55.5% 0.17 252.7)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900
#05427A
oklch(37.8% 0.111 252.6)
-
Step 950
950 (this color)
#042343
oklch(25.4% 0.07 252.6)
#042343 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) | #132544 | 0.018 |
| Deuteranopia (no green cones) | #072042 | 0.010 |
| Tritanopia (no blue cones) | #002B2F | 0.053 |
| Achromatopsia (no color) | #222222 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042343
#042343
oklch(25.4% 0.07 252.6)
- #321E00
#321E00
oklch(25.5% 0.054 73.8)
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 #042343, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.033
- Dark #1B2431 ΔE 0.043
- Rich Black #0D1B2A ΔE 0.050
- Navy Blue #001146 ΔE 0.056
- Marine #042E60 ΔE 0.060
- Jet #212529 ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.065
- Gunmetal #293241 ΔE 0.074
Use #042343 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.