#304D48
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.6% 0.036 182.4), rgb(48, 77, 72).
Aa
White text reads best on this color (9.20:1).
About this color
#304D48 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.036 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.011 away. White text reads best on it, at 9.20:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.28:1 |
| White text | 9.20:1 |
Values
| HEX | #304D48 |
| RGB | rgb(48, 77, 72) |
| HSL | hsl(170, 23%, 25%) |
| OKLCH | oklch(39.6% 0.036 182.4) |
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 #304D48 | 9.20:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #304D48 | 2.28:1 | Fails | Lc 12.8 | Not readable |
| #304D48 text on white | 9.20:1 | AAA | Lc 91.2 | Preferred for body text |
| #304D48 text on black | 2.28:1 | Fails | Lc -11.2 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5ECEA
oklch(93.7% 0.008 177.3)
-
Step 200
200
#CFDCDA
oklch(88.4% 0.014 185.9)
-
Step 300
300
#AFC7C2
oklch(81% 0.027 181.7)
-
Step 400
400
#83AAA3
oklch(70.7% 0.044 182.8)
-
Step 500
500
#63958C
oklch(63.2% 0.055 181.9)
-
Step 600
600
#497F76
oklch(55.6% 0.06 182.2)
-
Step 700
700
#3A6B63
oklch(49.1% 0.055 182.2)
-
Step 800
800
#305751
oklch(42.6% 0.046 183.2)
-
Step 900
900 (this color)
#304D48
oklch(39.6% 0.036 182.4)
-
Step 950
950
#1A2A27
oklch(27% 0.022 181.6)
#304D48 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) | #4A4A48 | 0.038 |
| Deuteranopia (no green cones) | #454648 | 0.036 |
| Tritanopia (no blue cones) | #264E4B | 0.011 |
| Achromatopsia (no color) | #484848 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304D48
#304D48
oklch(39.6% 0.036 182.4)
- #573F45
#573F45
oklch(39.6% 0.035 2.2)
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 #304D48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.011
- Dark Teal #014D4E ΔE 0.034
- Dark Blue Green #005249 ΔE 0.035
- Charcoal #264653 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.039
- Deep Teal #00555A ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.046
- Onyx #343A40 ΔE 0.060
Use #304D48 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.