#304E4E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40% 0.036 195.8), rgb(48, 78, 78).
Aa
White text reads best on this color (9.03:1).
About this color
#304E4E is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.036 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.003 away. White text reads best on it, at 9.03:1.
| 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 | 9.03:1 |
Values
| HEX | #304E4E |
| RGB | rgb(48, 78, 78) |
| HSL | hsl(180, 24%, 25%) |
| OKLCH | oklch(40% 0.036 195.8) |
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 #304E4E | 9.03:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #304E4E | 2.32:1 | Fails | Lc 13.3 | Not readable |
| #304E4E text on white | 9.03:1 | AAA | Lc 90.7 | Preferred for body text |
| #304E4E 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
#E4EBEB
oklch(93.5% 0.007 197)
-
Step 200
200
#CFDCDC
oklch(88.5% 0.014 196.9)
-
Step 300
300
#AEC6C6
oklch(80.9% 0.026 196.6)
-
Step 400
400
#82A9A9
oklch(70.6% 0.042 196.2)
-
Step 500
500
#619494
oklch(63.1% 0.055 195.9)
-
Step 600
600
#467E7F
oklch(55.5% 0.059 197.1)
-
Step 700
700
#376B6B
oklch(49.2% 0.056 195.5)
-
Step 800
800
#2E5757
oklch(42.7% 0.046 195.6)
-
Step 900
900 (this color)
#304E4E
oklch(40% 0.036 195.8)
-
Step 950
950
#192A2A
oklch(27% 0.023 195.9)
#304E4E 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) | #4A4B4E | 0.037 |
| Deuteranopia (no green cones) | #45474E | 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°).
- #304E4E
#304E4E
oklch(40% 0.036 195.8)
- #5A4041
#5A4041
oklch(40.1% 0.036 16.3)
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 #304E4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.003
- Charcoal #264653 ΔE 0.034
- Dark Teal #014D4E ΔE 0.035
- Deep Teal #00555A ΔE 0.035
- Dark Blue Green #005249 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.041
- Petrol #005F6A ΔE 0.061
Use #304E4E 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.