#304E4D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40% 0.036 193.1), rgb(48, 78, 77).
Aa
White text reads best on this color (9.04:1).
About this color
#304E4D is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.036 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.004 away. White text reads best on it, at 9.04:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.32:1 |
| White text | 9.04:1 |
Values
| HEX | #304E4D |
| RGB | rgb(48, 78, 77) |
| HSL | hsl(178, 24%, 25%) |
| OKLCH | oklch(40% 0.036 193.1) |
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 #304E4D | 9.04:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #304E4D | 2.32:1 | Fails | Lc 13.2 | Not readable |
| #304E4D text on white | 9.04:1 | AAA | Lc 90.7 | Preferred for body text |
| #304E4D text on black | 2.32:1 | Fails | Lc -11.6 | 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
#E4ECEB
oklch(93.7% 0.009 188.1)
-
Step 200
200
#CFDCDC
oklch(88.5% 0.014 196.9)
-
Step 300
300
#AEC6C5
oklch(80.8% 0.026 193.6)
-
Step 400
400
#82A9A8
oklch(70.6% 0.042 194.3)
-
Step 500
500
#619493
oklch(63% 0.055 194.3)
-
Step 600
600
#467F7D
oklch(55.7% 0.06 192.6)
-
Step 700
700
#376B69
oklch(49.1% 0.056 192.2)
-
Step 800
800
#2E5756
oklch(42.7% 0.046 193.5)
-
Step 900
900 (this color)
#304E4D
oklch(40% 0.036 193.1)
-
Step 950
950
#192A29
oklch(27% 0.023 191.2)
#304E4D 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) | #4B4B4D | 0.039 |
| Deuteranopia (no green cones) | #45474D | 0.035 |
| Tritanopia (no blue cones) | #24504E | 0.013 |
| Achromatopsia (no color) | #494949 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304E4D
#304E4D
oklch(40% 0.036 193.1)
- #594042
#594042
oklch(40% 0.035 13.4)
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 #304E4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.004
- Charcoal #264653 ΔE 0.034
- Dark Teal #014D4E ΔE 0.035
- Deep Teal #00555A ΔE 0.036
- Dark Blue Green #005249 ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.042
- Petrol #005F6A ΔE 0.062
Use #304E4D 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.