#334B4D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.4% 0.03 202.5), rgb(51, 75, 77).
Aa
White text reads best on this color (9.31:1).
About this color
#334B4D 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 0.013 away. White text reads best on it, at 9.31:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #334B4D |
| RGB | rgb(51, 75, 77) |
| HSL | hsl(185, 20%, 25%) |
| OKLCH | oklch(39.4% 0.03 202.5) |
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 #334B4D | 9.31:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #334B4D | 2.25:1 | Fails | Lc 12.5 | Not readable |
| #334B4D text on white | 9.31:1 | AAA | Lc 91.5 | Preferred for body text |
| #334B4D text on black | 2.25:1 | Fails | Lc -10.9 | 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
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B1C5C7
oklch(80.9% 0.022 204)
-
Step 400
400
#87A8AA
oklch(70.8% 0.036 200.9)
-
Step 500
500
#699295
oklch(63.1% 0.045 201.8)
-
Step 600
600
#507C80
oklch(55.6% 0.049 203.1)
-
Step 700
700
#40696C
oklch(49.2% 0.046 201.7)
-
Step 800
800
#355558
oklch(42.6% 0.038 203.3)
-
Step 900
900 (this color)
#334B4D
oklch(39.4% 0.03 202.5)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#334B4D 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) | #47494D | 0.029 |
| Deuteranopia (no green cones) | #43454D | 0.029 |
| Tritanopia (no blue cones) | #2A4D4C | 0.012 |
| Achromatopsia (no color) | #474747 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334B4D
#334B4D
oklch(39.4% 0.03 202.5)
- #55403F
#55403F
oklch(39.4% 0.029 21.6)
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 #334B4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.013
- Charcoal #264653 ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.035
- Dark Teal #014D4E ΔE 0.038
- Deep Teal #00555A ΔE 0.043
- Dark Blue Green #005249 ΔE 0.044
- Onyx #343A40 ΔE 0.054
Use #334B4D 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.