#434739
Closest named color: Charcoal Grey (#3C4142). oklch(39% 0.023 120.5), rgb(67, 71, 57).
Aa
White text reads best on this color (9.54:1).
About this color
#434739 is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.031 away. White text reads best on it, at 9.54:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.19:1 |
| White text | 9.54:1 |
Values
| HEX | #434739 |
| RGB | rgb(67, 71, 57) |
| HSL | hsl(77, 11%, 25%) |
| OKLCH | oklch(39% 0.023 120.5) |
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 #434739 | 9.54:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #434739 | 2.19:1 | Fails | Lc 11.8 | Not readable |
| #434739 text on white | 9.54:1 | AAA | Lc 92.1 | Preferred for body text |
| #434739 text on black | 2.19:1 | Fails | Lc -10.3 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E9EAE7
oklch(93.5% 0.004 121.6)
-
Step 200
200
#D8DAD3
oklch(88.5% 0.01 119.6)
-
Step 300
300
#BFC2B6
oklch(80.8% 0.017 118.2)
-
Step 400
400
#9EA490
oklch(70.8% 0.029 120.7)
-
Step 500
500
#868D75
oklch(63.1% 0.036 120.6)
-
Step 600
600
#70775D
oklch(55.6% 0.04 119.9)
-
Step 700
700
#5E644D
oklch(49.1% 0.036 119.6)
-
Step 800
800
#4C523F
oklch(42.7% 0.031 122)
-
Step 900
900 (this color)
#434739
oklch(39% 0.023 120.5)
-
Step 950
950
#252820
oklch(27.1% 0.015 124.1)
#434739 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) | #494538 | 0.011 |
| Deuteranopia (no green cones) | #48453A | 0.011 |
| Tritanopia (no blue cones) | #444543 | 0.020 |
| Achromatopsia (no color) | #454545 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434739
#434739
oklch(39% 0.023 120.5)
- #474250
#474250
oklch(38.9% 0.024 301.6)
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 #434739, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.031
- Dark Slate Gray #2F4F4F ΔE 0.041
- Onyx #343A40 ΔE 0.056
- Charcoal #264653 ΔE 0.057
- Dark Blue Green #005249 ΔE 0.063
- Dark Teal #014D4E ΔE 0.064
- Mud Brown #60460F ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.066
Use #434739 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.