#042F46
Closest named color: Oxford Blue (#1B263B). oklch(29% 0.061 238.3), rgb(4, 47, 70).
Aa
White text reads best on this color (13.99:1).
About this color
#042F46 is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.061 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.035 away. White text reads best on it, at 13.99:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.50:1 |
| White text | 13.99:1 |
Values
| HEX | #042F46 |
| RGB | rgb(4, 47, 70) |
| HSL | hsl(201, 89%, 15%) |
| OKLCH | oklch(29% 0.061 238.3) |
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 #042F46 | 13.99:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #042F46 | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #042F46 text on white | 13.99:1 | AAA | Lc 100.4 | Preferred for body text |
| #042F46 text on black | 1.50:1 | 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
#F0F7FB
oklch(97.2% 0.009 232.4)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C2DEF1
oklch(88.6% 0.04 237.6)
-
Step 300
300
#95C8EA
oklch(80.9% 0.072 238)
-
Step 400
400
#52AAE0
oklch(70.6% 0.116 238.4)
-
Step 500
500
#0093D4
oklch(63% 0.141 238.5)
-
Step 600
600
#007CB3
oklch(55.7% 0.124 238.2)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#004769
oklch(37.8% 0.084 238.3)
-
Step 950
950 (this color)
#042F46
oklch(29% 0.061 238.3)
#042F46 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) | #242F47 | 0.033 |
| Deuteranopia (no green cones) | #1B2946 | 0.027 |
| Tritanopia (no blue cones) | #003537 | 0.040 |
| Achromatopsia (no color) | #2C2C2C | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042F46
#042F46
oklch(29% 0.061 238.3)
- #412307
#412307
oklch(29% 0.06 59.3)
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 #042F46, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.035
- Midnight Green #073B4C ΔE 0.041
- Gunmetal #293241 ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.044
- Marine #042E60 ΔE 0.048
- Dark #1B2431 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.051
Use #042F46 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.