#042C3A
Closest named color: Oxford Blue (#1B263B). oklch(27.4% 0.049 226.7), rgb(4, 44, 58).
Aa
White text reads best on this color (14.72:1).
About this color
#042C3A is a dark, muted teal or cyan. In OKLCH its lightness is 27%, its chroma 0.049 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.030 away. White text reads best on it, at 14.72:1.
| Hue family | Teals and cyans |
| Lightness | dark (27%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.42:1 |
| White text | 14.72:1 |
Values
| HEX | #042C3A |
| RGB | rgb(4, 44, 58) |
| HSL | hsl(196, 87%, 12%) |
| OKLCH | oklch(27.4% 0.049 226.7) |
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 #042C3A | 14.72:1 | AAA | Lc -104.2 | Preferred for body text |
| Black text on #042C3A | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #042C3A text on white | 14.72:1 | AAA | Lc 101.3 | Preferred for body text |
| #042C3A text on black | 1.42:1 | 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
#C4DEEA
oklch(88.5% 0.032 227.3)
-
Step 300
300
#99C9DE
oklch(80.9% 0.058 226.6)
-
Step 400
400
#5AACCE
oklch(70.6% 0.094 227.4)
-
Step 500
500
#0C97C1
oklch(63.1% 0.12 226.8)
-
Step 600
600
#007FA3
oklch(55.6% 0.107 226.4)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#005772
oklch(42.6% 0.083 227.6)
-
Step 900
900
#00495F
oklch(37.8% 0.072 226.2)
-
Step 950
950 (this color)
#042C3A
oklch(27.4% 0.049 226.7)
#042C3A 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) | #242B3B | 0.036 |
| Deuteranopia (no green cones) | #1D263A | 0.031 |
| Tritanopia (no blue cones) | #003031 | 0.026 |
| Achromatopsia (no color) | #282828 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042C3A
#042C3A
oklch(27.4% 0.049 226.7)
- #3B1F11
#3B1F11
oklch(27.4% 0.05 46.5)
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 #042C3A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.030
- Dark #1B2431 ΔE 0.033
- Jet #212529 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.051
- Gunmetal #293241 ΔE 0.051
- Midnight Green #073B4C ΔE 0.056
- Rich Black #0D1B2A ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.064
Use #042C3A 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.