#2A403A
Closest named color: Onyx (#343A40). oklch(35.1% 0.03 175.6), rgb(42, 64, 58).
Aa
White text reads best on this color (11.09:1).
About this color
#2A403A is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.029 away. White text reads best on it, at 11.09:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.89:1 |
| White text | 11.09:1 |
Values
| HEX | #2A403A |
| RGB | rgb(42, 64, 58) |
| HSL | hsl(164, 21%, 21%) |
| OKLCH | oklch(35.1% 0.03 175.6) |
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 #2A403A | 11.09:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #2A403A | 1.89:1 | Fails | Lc 8.3 | Not readable |
| #2A403A text on white | 11.09:1 | AAA | Lc 95.6 | Preferred for body text |
| #2A403A text on black | 1.89:1 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E6EBE9
oklch(93.6% 0.006 170.4)
-
Step 200
200
#D1DCD9
oklch(88.5% 0.013 178)
-
Step 300
300
#B3C6C0
oklch(81% 0.022 174.8)
-
Step 400
400
#8AA89F
oklch(70.6% 0.036 175.1)
-
Step 500
500
#6C9388
oklch(63.1% 0.046 175.5)
-
Step 600
600
#547D72
oklch(55.6% 0.049 175.8)
-
Step 700
700
#44695F
oklch(49% 0.045 175.5)
-
Step 800
800
#38564E
oklch(42.7% 0.038 175.9)
-
Step 900
900 (this color)
#2A403A
oklch(35.1% 0.03 175.6)
-
Step 950
950
#1D2A26
oklch(27.2% 0.019 173.9)
#2A403A 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) | #3E3D3A | 0.031 |
| Deuteranopia (no green cones) | #3A3A3A | 0.030 |
| Tritanopia (no blue cones) | #24413E | 0.009 |
| Achromatopsia (no color) | #3C3C3C | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A403A
#2A403A
oklch(35.1% 0.03 175.6)
- #48343B
#48343B
oklch(35% 0.031 356)
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 #2A403A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.032
- Charcoal #264653 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.044
- Dark Teal #014D4E ΔE 0.049
- Midnight Green #073B4C ΔE 0.051
- Evergreen #05472A ΔE 0.052
- Gunmetal #293241 ΔE 0.054
Use #2A403A 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.