#042938
Closest named color: Oxford Blue (#1B263B). oklch(26.4% 0.049 230.1), rgb(4, 41, 56).
Aa
White text reads best on this color (15.22:1).
About this color
#042938 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.049 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.027 away. White text reads best on it, at 15.22:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.37:1 |
| White text | 15.22:1 |
Values
| HEX | #042938 |
| RGB | rgb(4, 41, 56) |
| HSL | hsl(197, 87%, 12%) |
| OKLCH | oklch(26.4% 0.049 230.1) |
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 #042938 | 15.22:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #042938 | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #042938 text on white | 15.22:1 | AAA | Lc 101.9 | Preferred for body text |
| #042938 text on black | 1.37:1 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DFECF3
oklch(93.5% 0.017 230.9)
-
Step 200
200
#C5DEEB
oklch(88.6% 0.032 230.3)
-
Step 300
300
#9BC8DF
oklch(80.9% 0.057 230.5)
-
Step 400
400
#5EABCF
oklch(70.6% 0.093 230.2)
-
Step 500
500
#1F96C3
oklch(63.2% 0.118 229.9)
-
Step 600
600
#007EA7
oklch(55.5% 0.111 230)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#004862
oklch(37.7% 0.076 230.8)
-
Step 950
950 (this color)
#042938
oklch(26.4% 0.049 230.1)
#042938 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) | #212839 | 0.033 |
| Deuteranopia (no green cones) | #1A2338 | 0.029 |
| Tritanopia (no blue cones) | #002D2E | 0.028 |
| Achromatopsia (no color) | #262626 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042938
#042938
oklch(26.4% 0.049 230.1)
- #381D0E
#381D0E
oklch(26.4% 0.049 48.6)
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 #042938, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.027
- Dark #1B2431 ΔE 0.028
- Jet #212529 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.056
- Gunmetal #293241 ΔE 0.058
- Midnight Green #073B4C ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.072
Use #042938 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.