#304F4E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.3% 0.037 193.2), rgb(48, 79, 78).
Aa
White text reads best on this color (8.92:1).
About this color
#304F4E is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.037 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.002 away. White text reads best on it, at 8.92:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #304F4E |
| RGB | rgb(48, 79, 78) |
| HSL | hsl(178, 24%, 25%) |
| OKLCH | oklch(40.3% 0.037 193.2) |
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 #304F4E | 8.92:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #304F4E | 2.35:1 | Fails | Lc 13.6 | Not readable |
| #304F4E text on white | 8.92:1 | AAA | Lc 90.4 | Preferred for body text |
| #304F4E text on black | 2.35:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D1DCDB
oklch(88.6% 0.012 190.4)
-
Step 300
300
#B2C5C4
oklch(80.9% 0.021 192.9)
-
Step 400
400
#89A8A6
oklch(70.8% 0.034 191.6)
-
Step 500
500
#6A9291
oklch(63% 0.044 194.2)
-
Step 600
600
#517C7B
oklch(55.5% 0.048 194)
-
Step 700
700
#426968
oklch(49.2% 0.044 193.7)
-
Step 800
800 (this color)
#304F4E
oklch(40.3% 0.037 193.2)
-
Step 900
900
#2F4746
oklch(37.8% 0.03 192.7)
-
Step 950
950
#1C2929
oklch(26.9% 0.018 196.1)
#304F4E 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) | #4B4C4E | 0.038 |
| Deuteranopia (no green cones) | #46484E | 0.036 |
| Tritanopia (no blue cones) | #24514F | 0.013 |
| Achromatopsia (no color) | #4A4A4A | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304F4E
#304F4E
oklch(40.3% 0.037 193.2)
- #5B4043
#5B4043
oklch(40.3% 0.038 11.5)
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 #304F4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.002
- Deep Teal #00555A ΔE 0.034
- Dark Teal #014D4E ΔE 0.036
- Dark Blue Green #005249 ΔE 0.036
- Charcoal #264653 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.044
- Petrol #005F6A ΔE 0.059
Use #304F4E 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.