#304D50
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.9% 0.035 204.1), rgb(48, 77, 80).
Aa
White text reads best on this color (9.11:1).
About this color
#304D50 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.035 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.007 away. White text reads best on it, at 9.11:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #304D50 |
| RGB | rgb(48, 77, 80) |
| HSL | hsl(186, 25%, 25%) |
| OKLCH | oklch(39.9% 0.035 204.1) |
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 #304D50 | 9.11:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #304D50 | 2.30:1 | Fails | Lc 13.0 | Not readable |
| #304D50 text on white | 9.11:1 | AAA | Lc 90.9 | Preferred for body text |
| #304D50 text on black | 2.30:1 | Fails | Lc -11.4 | 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
#AEC6C8
oklch(80.9% 0.026 202.8)
-
Step 400
400
#82A9AD
oklch(70.8% 0.043 204)
-
Step 500
500
#629398
oklch(63% 0.053 204)
-
Step 600
600
#477E83
oklch(55.7% 0.059 203.2)
-
Step 700
700
#386A6F
oklch(49.1% 0.054 204)
-
Step 800
800
#2F565A
oklch(42.6% 0.045 204.1)
-
Step 900
900 (this color)
#304D50
oklch(39.9% 0.035 204.1)
-
Step 950
950
#192A2B
oklch(27.1% 0.023 200.6)
#304D50 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) | #494B50 | 0.035 |
| Deuteranopia (no green cones) | #434650 | 0.033 |
| Tritanopia (no blue cones) | #234F4E | 0.016 |
| Achromatopsia (no color) | #484848 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304D50
#304D50
oklch(39.9% 0.035 204.1)
- #59403E
#59403E
oklch(39.8% 0.035 24)
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 #304D50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.007
- Charcoal #264653 ΔE 0.029
- Dark Teal #014D4E ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.035
- Deep Teal #00555A ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.039
- Dark Blue Green #005249 ΔE 0.040
- Onyx #343A40 ΔE 0.060
Use #304D50 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.