#305155
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.1% 0.039 205.6), rgb(48, 81, 85).
Aa
White text reads best on this color (8.62:1).
About this color
#305155 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.039 and its hue 206°. 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 8.62:1.
| 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 | 8.62:1 |
Values
| HEX | #305155 |
| RGB | rgb(48, 81, 85) |
| HSL | hsl(186, 28%, 26%) |
| OKLCH | oklch(41.1% 0.039 205.6) |
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 #305155 | 8.62:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #305155 | 2.43:1 | Fails | Lc 14.4 | Not readable |
| #305155 text on white | 8.62:1 | AAA | Lc 89.6 | Fine for body text |
| #305155 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
#87A8AC
oklch(70.8% 0.037 205.5)
-
Step 500
500
#689297
oklch(63.1% 0.046 205.3)
-
Step 600
600
#4E7C82
oklch(55.6% 0.051 206.3)
-
Step 700
700
#3F696E
oklch(49.2% 0.047 205.4)
-
Step 800
800 (this color)
#305155
oklch(41.1% 0.039 205.6)
-
Step 900
900
#2E4649
oklch(37.6% 0.03 205.8)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#305155 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) | #4C4E55 | 0.039 |
| Deuteranopia (no green cones) | #464A55 | 0.035 |
| Tritanopia (no blue cones) | #205452 | 0.019 |
| Achromatopsia (no color) | #4C4C4C | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305155
#305155
oklch(41.1% 0.039 205.6)
- #5E4340
#5E4340
oklch(41.2% 0.038 26)
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 #305155, 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
- Deep Teal #00555A ΔE 0.031
- Charcoal #264653 ΔE 0.039
- Dark Teal #014D4E ΔE 0.040
- Dark Blue Green #005249 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.042
- Petrol #005F6A ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.052
Use #305155 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.