#304A50
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.1% 0.033 213.7), rgb(48, 74, 80).
Aa
White text reads best on this color (9.45:1).
About this color
#304A50 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.033 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.017 away. White text reads best on it, at 9.45:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.22:1 |
| White text | 9.45:1 |
Values
| HEX | #304A50 |
| RGB | rgb(48, 74, 80) |
| HSL | hsl(191, 25%, 25%) |
| OKLCH | oklch(39.1% 0.033 213.7) |
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 #304A50 | 9.45:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #304A50 | 2.22:1 | Fails | Lc 12.1 | Not readable |
| #304A50 text on white | 9.45:1 | AAA | Lc 91.8 | Preferred for body text |
| #304A50 text on black | 2.22:1 | Fails | Lc -10.6 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#CFDCDF
oklch(88.6% 0.015 213.1)
-
Step 300
300
#AFC5CA
oklch(80.8% 0.025 212.9)
-
Step 400
400
#85A8B0
oklch(70.8% 0.04 213.2)
-
Step 500
500
#65929C
oklch(63.1% 0.051 213)
-
Step 600
600
#4B7C87
oklch(55.6% 0.056 213.6)
-
Step 700
700
#3C6872
oklch(48.9% 0.051 213.9)
-
Step 800
800
#32555D
oklch(42.6% 0.043 213.9)
-
Step 900
900 (this color)
#304A50
oklch(39.1% 0.033 213.7)
-
Step 950
950
#1A292D
oklch(26.9% 0.022 216.2)
#304A50 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) | #454850 | 0.030 |
| Deuteranopia (no green cones) | #404450 | 0.028 |
| Tritanopia (no blue cones) | #244D4C | 0.019 |
| Achromatopsia (no color) | #464646 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304A50
#304A50
oklch(39.1% 0.033 213.7)
- #563F3A
#563F3A
oklch(39.1% 0.034 32.5)
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 #304A50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.017
- Charcoal #264653 ΔE 0.020
- Dark Grey Blue #29465B ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.033
- Dark Teal #014D4E ΔE 0.036
- Deep Teal #00555A ΔE 0.042
- Dark Blue Green #005249 ΔE 0.046
- Onyx #343A40 ΔE 0.051
Use #304A50 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.