#305756
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.8% 0.044 193.5), rgb(48, 87, 86).
Aa
White text reads best on this color (8.00:1).
About this color
#305756 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.044 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.026 away. White text reads best on it, at 8.00:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.62:1 |
| White text | 8.00:1 |
Values
| HEX | #305756 |
| RGB | rgb(48, 87, 86) |
| HSL | hsl(178, 29%, 26%) |
| OKLCH | oklch(42.8% 0.044 193.5) |
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 #305756 | 8.00:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #305756 | 2.62:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #305756 text on white | 8.00:1 | AAA | Lc 87.7 | Fine for body text |
| #305756 text on black | 2.62:1 | Fails | Lc -14.5 | 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
#E4EBEB
oklch(93.5% 0.007 197)
-
Step 200
200
#CFDCDC
oklch(88.5% 0.014 196.9)
-
Step 300
300
#AEC6C5
oklch(80.8% 0.026 193.6)
-
Step 400
400
#83A9A8
oklch(70.7% 0.041 194.2)
-
Step 500
500
#639492
oklch(63.1% 0.053 192.7)
-
Step 600
600
#487E7D
oklch(55.5% 0.058 194.1)
-
Step 700
700
#396A69
oklch(49% 0.053 193.8)
-
Step 800
800 (this color)
#305756
oklch(42.8% 0.044 193.5)
-
Step 900
900
#2B4847
oklch(37.8% 0.035 193)
-
Step 950
950
#1A2A29
oklch(27% 0.022 191)
#305756 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) | #535356 | 0.048 |
| Deuteranopia (no green cones) | #4C4E56 | 0.044 |
| Tritanopia (no blue cones) | #1E5957 | 0.016 |
| Achromatopsia (no color) | #505050 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305756
#305756
oklch(42.8% 0.044 193.5)
- #654548
#654548
oklch(42.7% 0.044 12.9)
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 #305756, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.026
- Deep Teal #00555A ΔE 0.032
- Petrol #005F6A ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.039
- Dark Blue Green #005249 ΔE 0.044
- Dark Teal #014D4E ΔE 0.051
- Dark Aqua #05696B ΔE 0.057
- Charcoal #264653 ΔE 0.058
Use #305756 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.