#364E58
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.8% 0.034 225.7), rgb(54, 78, 88).
Aa
White text reads best on this color (8.79:1).
About this color
#364E58 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.034 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 8.79:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.38:1 |
| White text | 8.79:1 |
Values
| HEX | #364E58 |
| RGB | rgb(54, 78, 88) |
| HSL | hsl(198, 24%, 28%) |
| OKLCH | oklch(40.8% 0.034 225.7) |
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 #364E58 | 8.79:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #364E58 | 2.38:1 | Fails | Lc 13.9 | Not readable |
| #364E58 text on white | 8.79:1 | AAA | Lc 90.1 | Preferred for body text |
| #364E58 text on black | 2.38:1 | Fails | Lc -12.2 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBDF
oklch(88.6% 0.011 226)
-
Step 300
300
#B4C4CA
oklch(81% 0.019 222.2)
-
Step 400
400
#8CA5B0
oklch(70.6% 0.032 226.2)
-
Step 500
500
#708F9C
oklch(63.1% 0.04 225.4)
-
Step 600
600
#587987
oklch(55.6% 0.043 226)
-
Step 700
700
#476672
oklch(49.1% 0.041 224)
-
Step 800
800 (this color)
#364E58
oklch(40.8% 0.034 225.7)
-
Step 900
900
#33454C
oklch(37.8% 0.026 223.7)
-
Step 950
950
#1E282D
oklch(27% 0.017 229.8)
#364E58 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) | #494D59 | 0.027 |
| Deuteranopia (no green cones) | #434958 | 0.023 |
| Tritanopia (no blue cones) | #2A5151 | 0.023 |
| Achromatopsia (no color) | #4A4A4A | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #364E58
#364E58
oklch(40.8% 0.034 225.7)
- #5A443B
#5A443B
oklch(40.8% 0.034 43.3)
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 #364E58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Dark Grey Blue #29465B ΔE 0.034
- Charcoal #264653 ΔE 0.035
- Deep Teal #00555A ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.046
- Dark Teal #014D4E ΔE 0.047
- Dark Blue Green #005249 ΔE 0.053
- Petrol #005F6A ΔE 0.058
Use #364E58 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.