#042943
Closest named color: Oxford Blue (#1B263B). oklch(27.1% 0.063 244.6), rgb(4, 41, 67).
Aa
White text reads best on this color (14.96:1).
About this color
#042943 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.063 and its hue 245°. 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 14.96:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.40:1 |
| White text | 14.96:1 |
Values
| HEX | #042943 |
| RGB | rgb(4, 41, 67) |
| HSL | hsl(205, 89%, 14%) |
| OKLCH | oklch(27.1% 0.063 244.6) |
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 #042943 | 14.96:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #042943 | 1.40:1 | Fails | Lc 0.0 | Not readable |
| #042943 text on white | 14.96:1 | AAA | Lc 101.6 | Preferred for body text |
| #042943 text on black | 1.40:1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C3DDF3
oklch(88.5% 0.041 243.7)
-
Step 300
300
#98C6EE
oklch(80.8% 0.075 245.2)
-
Step 400
400
#5AA8E6
oklch(70.8% 0.119 244.6)
-
Step 500
500
#1590DE
oklch(63.1% 0.152 244.7)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0066A1
oklch(49.2% 0.123 244.5)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900
#004570
oklch(37.7% 0.095 244.9)
-
Step 950
950 (this color)
#042943
oklch(27.1% 0.063 244.6)
#042943 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) | #1D2A44 | 0.027 |
| Deuteranopia (no green cones) | #132443 | 0.020 |
| Tritanopia (no blue cones) | #002F32 | 0.043 |
| Achromatopsia (no color) | #272727 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042943
#042943
oklch(27.1% 0.063 244.6)
- #3B1F00
#3B1F00
oklch(27.1% 0.061 64)
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 #042943, 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 0.039
- Space Cadet #2B2D42 ΔE 0.051
- Marine #042E60 ΔE 0.054
- Jet #212529 ΔE 0.054
- Gunmetal #293241 ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.059
- Rich Black #0D1B2A ΔE 0.060
Use #042943 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.