#042838
Closest named color: Oxford Blue (#1B263B). oklch(26.1% 0.049 232.4), rgb(4, 40, 56).
Aa
White text reads best on this color (15.37:1).
About this color
#042838 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.049 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.026 away. White text reads best on it, at 15.37:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.37:1 |
Values
| HEX | #042838 |
| RGB | rgb(4, 40, 56) |
| HSL | hsl(198, 87%, 12%) |
| OKLCH | oklch(26.1% 0.049 232.4) |
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 #042838 | 15.37:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #042838 | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #042838 text on white | 15.37:1 | AAA | Lc 102.1 | Preferred for body text |
| #042838 text on black | 1.36:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#DFECF3
oklch(93.5% 0.017 230.9)
-
Step 200
200
#C5DDEB
oklch(88.4% 0.032 233.3)
-
Step 300
300
#9BC8E0
oklch(80.9% 0.058 231.7)
-
Step 400
400
#60ABD1
oklch(70.7% 0.093 232.2)
-
Step 500
500
#2395C5
oklch(63.1% 0.119 232.2)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950 (this color)
#042838
oklch(26.1% 0.049 232.4)
#042838 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) | #202739 | 0.032 |
| Deuteranopia (no green cones) | #192338 | 0.026 |
| Tritanopia (no blue cones) | #002C2D | 0.029 |
| Achromatopsia (no color) | #252525 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042838
#042838
oklch(26.1% 0.049 232.4)
- #371D0C
#371D0C
oklch(26.2% 0.049 52.1)
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 #042838, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.026
- Dark #1B2431 ΔE 0.027
- Jet #212529 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.057
- Gunmetal #293241 ΔE 0.061
- Midnight Green #073B4C ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.074
Use #042838 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.