#366F74
Closest named color: Deep Turquoise (#017374). oklch(50.5% 0.06 203), rgb(54, 111, 116).
Aa
White text reads best on this color (5.70:1).
About this color
#366F74 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.060 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.027 away. White text reads best on it, at 5.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.68:1 |
| White text | 5.70:1 |
Values
| HEX | #366F74 |
| RGB | rgb(54, 111, 116) |
| HSL | hsl(185, 36%, 33%) |
| OKLCH | oklch(50.5% 0.06 203) |
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 #366F74 | 5.70:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #366F74 | 3.68:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #366F74 text on white | 5.70:1 | AA | Lc 78.4 | Fine for body text |
| #366F74 text on black | 3.68:1 | AA large text | Lc -23.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CEDCDE
oklch(88.4% 0.015 207.1)
-
Step 300
300
#ACC7C9
oklch(81% 0.029 202.1)
-
Step 400
400
#7FAAAD
oklch(70.8% 0.046 201.5)
-
Step 500
500
#5C9499
oklch(63% 0.059 203)
-
Step 600
600
#407F84
oklch(55.7% 0.065 202.3)
-
Step 700
700 (this color)
#366F74
oklch(50.5% 0.06 203)
-
Step 800
800
#2A575B
oklch(42.7% 0.05 203.1)
-
Step 900
900
#27484B
oklch(37.8% 0.039 203.2)
-
Step 950
950
#172A2C
oklch(27% 0.025 204.3)
#366F74 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) | #686B74 | 0.061 |
| Deuteranopia (no green cones) | #5D6374 | 0.056 |
| Tritanopia (no blue cones) | #0A7370 | 0.028 |
| Achromatopsia (no color) | #666666 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366F74
#366F74
oklch(50.5% 0.06 203)
- #845755
#845755
oklch(50.5% 0.06 22.2)
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 #366F74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.027
- Dark Aquamarine #017371 ΔE 0.029
- Deep Aqua #08787F ΔE 0.032
- Bluegreen #017A79 ΔE 0.037
- Dark Aqua #05696B ΔE 0.038
- Slate #516572 ΔE 0.039
- Teal #008080 ΔE 0.051
- Ocean #017B92 ΔE 0.051
Use #366F74 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.