#334A4F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.2% 0.03 212.6), rgb(51, 74, 79).
Aa
White text reads best on this color (9.40:1).
About this color
#334A4F is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.017 away. White text reads best on it, at 9.40:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #334A4F |
| RGB | rgb(51, 74, 79) |
| HSL | hsl(191, 22%, 25%) |
| OKLCH | oklch(39.2% 0.03 212.6) |
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 #334A4F | 9.40:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #334A4F | 2.23:1 | Fails | Lc 12.2 | Not readable |
| #334A4F text on white | 9.40:1 | AAA | Lc 91.7 | Preferred for body text |
| #334A4F text on black | 2.23:1 | Fails | Lc -10.7 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DBDE
oklch(88.4% 0.013 215.8)
-
Step 300
300
#B1C5C9
oklch(81% 0.023 211.1)
-
Step 400
400
#88A7AE
oklch(70.7% 0.036 212.9)
-
Step 500
500
#6A919A
oklch(63.1% 0.045 213.5)
-
Step 600
600
#507B84
oklch(55.5% 0.049 212.2)
-
Step 700
700
#416870
oklch(49.1% 0.046 212)
-
Step 800
800
#36555B
oklch(42.8% 0.038 211.1)
-
Step 900
900 (this color)
#334A4F
oklch(39.2% 0.03 212.6)
-
Step 950
950
#1C292C
oklch(27% 0.019 213.5)
#334A4F 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) | #46484F | 0.028 |
| Deuteranopia (no green cones) | #41454F | 0.024 |
| Tritanopia (no blue cones) | #294C4B | 0.016 |
| Achromatopsia (no color) | #464646 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334A4F
#334A4F
oklch(39.2% 0.03 212.6)
- #54403C
#54403C
oklch(39.2% 0.029 31.4)
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 #334A4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.017
- Charcoal #264653 ΔE 0.024
- Dark Grey Blue #29465B ΔE 0.030
- Charcoal Grey #3C4142 ΔE 0.031
- Dark Teal #014D4E ΔE 0.039
- Deep Teal #00555A ΔE 0.044
- Dark Blue Green #005249 ΔE 0.047
- Onyx #343A40 ΔE 0.051
Use #334A4F 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.