#305156
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.2% 0.039 208), rgb(48, 81, 86).
Aa
White text reads best on this color (8.61:1).
About this color
#305156 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.039 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.012 away. White text reads best on it, at 8.61:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.43:1 |
| White text | 8.61:1 |
Values
| HEX | #305156 |
| RGB | rgb(48, 81, 86) |
| HSL | hsl(188, 28%, 26%) |
| OKLCH | oklch(41.2% 0.039 208) |
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 #305156 | 8.61:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #305156 | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #305156 text on white | 8.61:1 | AAA | Lc 89.5 | Fine for body text |
| #305156 text on black | 2.43:1 | Fails | Lc -12.7 | 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
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B0C5C8
oklch(80.8% 0.023 207.1)
-
Step 400
400
#87A7AD
oklch(70.6% 0.036 210.3)
-
Step 500
500
#689298
oklch(63.1% 0.047 207.1)
-
Step 600
600
#4E7C83
oklch(55.6% 0.051 208)
-
Step 700
700
#3F696F
oklch(49.2% 0.048 207.3)
-
Step 800
800 (this color)
#305156
oklch(41.2% 0.039 208)
-
Step 900
900
#2E464A
oklch(37.6% 0.03 209)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#305156 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) | #4C4F56 | 0.038 |
| Deuteranopia (no green cones) | #464A56 | 0.035 |
| Tritanopia (no blue cones) | #205452 | 0.020 |
| Achromatopsia (no color) | #4C4C4C | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305156
#305156
oklch(41.2% 0.039 208)
- #5F433F
#5F433F
oklch(41.3% 0.04 28.1)
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 #305156, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.012
- Deep Teal #00555A ΔE 0.031
- Charcoal #264653 ΔE 0.039
- Dark Teal #014D4E ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.041
- Dark Blue Green #005249 ΔE 0.043
- Petrol #005F6A ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.052
Use #305156 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.