#2A3E48
Closest named color: Onyx (#343A40). oklch(35.1% 0.031 230.4), rgb(42, 62, 72).
Aa
White text reads best on this color (11.16:1).
About this color
#2A3E48 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.031 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.020 away. White text reads best on it, at 11.16:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #2A3E48 |
| RGB | rgb(42, 62, 72) |
| HSL | hsl(200, 26%, 22%) |
| OKLCH | oklch(35.1% 0.031 230.4) |
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 #2A3E48 | 11.16:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #2A3E48 | 1.88:1 | Fails | Lc 8.1 | Not readable |
| #2A3E48 text on white | 11.16:1 | AAA | Lc 95.8 | Preferred for body text |
| #2A3E48 text on black | 1.88:1 | 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 900.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D1DBE0
oklch(88.5% 0.013 228.9)
-
Step 300
300
#B2C4CD
oklch(80.9% 0.023 229.2)
-
Step 400
400
#8AA5B4
oklch(70.6% 0.037 232.3)
-
Step 500
500
#6C8FA1
oklch(63% 0.048 230.8)
-
Step 600
600
#54798C
oklch(55.6% 0.051 231.2)
-
Step 700
700
#446677
oklch(49.1% 0.048 230.6)
-
Step 800
800
#385361
oklch(42.6% 0.04 231.5)
-
Step 900
900 (this color)
#2A3E48
oklch(35.1% 0.031 230.4)
-
Step 950
950
#1D282E
oklch(26.9% 0.019 232.2)
#2A3E48 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) | #393D49 | 0.022 |
| Deuteranopia (no green cones) | #353A48 | 0.020 |
| Tritanopia (no blue cones) | #1F4141 | 0.023 |
| Achromatopsia (no color) | #3B3B3B | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3E48
#2A3E48
oklch(35.1% 0.031 230.4)
- #48362C
#48362C
oklch(35% 0.031 50.4)
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 #2A3E48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.021
- Charcoal #264653 ΔE 0.027
- Charcoal Grey #3C4142 ΔE 0.031
- Midnight Green #073B4C ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.036
- Gunmetal #293241 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.049
Use #2A3E48 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.