#334C54
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40% 0.033 219.8), rgb(51, 76, 84).
Aa
White text reads best on this color (9.12:1).
About this color
#334C54 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.033 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.016 away. White text reads best on it, at 9.12:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #334C54 |
| RGB | rgb(51, 76, 84) |
| HSL | hsl(195, 24%, 26%) |
| OKLCH | oklch(40% 0.033 219.8) |
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 #334C54 | 9.12:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #334C54 | 2.30:1 | Fails | Lc 13.0 | Not readable |
| #334C54 text on white | 9.12:1 | AAA | Lc 91.0 | Preferred for body text |
| #334C54 text on black | 2.30:1 | Fails | Lc -11.4 | 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
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBDF
oklch(88.4% 0.013 221.4)
-
Step 300
300
#B0C5CC
oklch(81% 0.025 219.8)
-
Step 400
400
#86A7B2
oklch(70.7% 0.04 220.1)
-
Step 500
500
#66919F
oklch(63% 0.051 220.1)
-
Step 600
600
#4D7B8A
oklch(55.6% 0.055 220.6)
-
Step 700
700
#3D6875
oklch(49.1% 0.052 219.3)
-
Step 800
800
#33555F
oklch(42.8% 0.043 218.5)
-
Step 900
900 (this color)
#334C54
oklch(40% 0.033 219.8)
-
Step 950
950
#1B292E
oklch(27% 0.021 222)
#334C54 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) | #474A54 | 0.029 |
| Deuteranopia (no green cones) | #424654 | 0.027 |
| Tritanopia (no blue cones) | #274F4E | 0.021 |
| Achromatopsia (no color) | #484848 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334C54
#334C54
oklch(40% 0.033 219.8)
- #58423A
#58423A
oklch(40.1% 0.034 40.9)
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 #334C54, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.016
- Charcoal #264653 ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.039
- Deep Teal #00555A ΔE 0.040
- Dark Teal #014D4E ΔE 0.041
- Dark Blue Green #005249 ΔE 0.049
- Onyx #343A40 ΔE 0.059
Use #334C54 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.