#042647
Closest named color: Oxford Blue (#1B263B). oklch(26.6% 0.072 251.7), rgb(4, 38, 71).
Aa
White text reads best on this color (15.29:1).
About this color
#042647 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.072 and its hue 252°. 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 15.29:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.37:1 |
| White text | 15.29:1 |
Values
| HEX | #042647 |
| RGB | rgb(4, 38, 71) |
| HSL | hsl(210, 89%, 15%) |
| OKLCH | oklch(26.6% 0.072 251.7) |
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 #042647 | 15.29:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #042647 | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #042647 text on white | 15.29:1 | AAA | Lc 101.9 | Preferred for body text |
| #042647 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEEBFA
oklch(93.5% 0.025 251.9)
-
Step 200
200
#C3DCF8
oklch(88.5% 0.047 251.3)
-
Step 300
300
#98C5F7
oklch(81% 0.086 251.5)
-
Step 400
400
#5BA5F3
oklch(70.8% 0.137 251.4)
-
Step 500
500
#1E8BEF
oklch(63.1% 0.176 251.9)
-
Step 600
600
#0074CF
oklch(55.5% 0.165 251.7)
-
Step 700
700
#0061AF
oklch(49% 0.146 251.8)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900
#00427A
oklch(37.7% 0.112 251.7)
-
Step 950
950 (this color)
#042647
oklch(26.6% 0.072 251.7)
#042647 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) | #152848 | 0.019 |
| Deuteranopia (no green cones) | #092246 | 0.013 |
| Tritanopia (no blue cones) | #002E33 | 0.053 |
| Achromatopsia (no color) | #252525 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042647
#042647
oklch(26.6% 0.072 251.7)
- #362000
#362000
oklch(26.6% 0.057 72.2)
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 #042647, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.032
- Dark #1B2431 ΔE 0.045
- Marine #042E60 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.063
- Jet #212529 ΔE 0.063
- Navy Blue #001146 ΔE 0.065
Use #042647 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.