#304D4E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.8% 0.035 198.6), rgb(48, 77, 78).
Aa
White text reads best on this color (9.14:1).
About this color
#304D4E is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.035 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.006 away. White text reads best on it, at 9.14:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.29:1 |
| White text | 9.14:1 |
Values
| HEX | #304D4E |
| RGB | rgb(48, 77, 78) |
| HSL | hsl(182, 24%, 25%) |
| OKLCH | oklch(39.8% 0.035 198.6) |
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 #304D4E | 9.14:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #304D4E | 2.29:1 | Fails | Lc 13.0 | Not readable |
| #304D4E text on white | 9.14:1 | AAA | Lc 91.0 | Preferred for body text |
| #304D4E text on black | 2.29:1 | Fails | Lc -11.3 | 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
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AEC6C7
oklch(80.9% 0.026 199.7)
-
Step 400
400
#83A9AA
oklch(70.7% 0.041 198.3)
-
Step 500
500
#629495
oklch(63.2% 0.054 197.5)
-
Step 600
600
#477E80
oklch(55.6% 0.058 198.6)
-
Step 700
700
#386A6C
oklch(49% 0.054 198.9)
-
Step 800
800
#2F5758
oklch(42.8% 0.045 197.7)
-
Step 900
900 (this color)
#304D4E
oklch(39.8% 0.035 198.6)
-
Step 950
950
#192A2A
oklch(27% 0.023 195.9)
#304D4E 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) | #494A4E | 0.036 |
| Deuteranopia (no green cones) | #44464E | 0.034 |
| Tritanopia (no blue cones) | #244F4D | 0.014 |
| Achromatopsia (no color) | #484848 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304D4E
#304D4E
oklch(39.8% 0.035 198.6)
- #584040
#584040
oklch(39.8% 0.034 18.7)
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 #304D4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.006
- Charcoal #264653 ΔE 0.031
- Dark Teal #014D4E ΔE 0.034
- Deep Teal #00555A ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.038
- Dark Blue Green #005249 ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.039
- Onyx #343A40 ΔE 0.060
Use #304D4E 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.