#366D7E
Closest named color: Slate (#516572). oklch(50.4% 0.064 220.5), rgb(54, 109, 126).
Aa
White text reads best on this color (5.76:1).
About this color
#366D7E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.064 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.036 away. White text reads best on it, at 5.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.64:1 |
| White text | 5.76:1 |
Values
| HEX | #366D7E |
| RGB | rgb(54, 109, 126) |
| HSL | hsl(194, 40%, 35%) |
| OKLCH | oklch(50.4% 0.064 220.5) |
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 #366D7E | 5.76:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #366D7E | 3.64:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #366D7E text on white | 5.76:1 | AA | Lc 78.7 | Fine for body text |
| #366D7E text on black | 3.64:1 | AA large text | Lc -23.1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CDDCE1
oklch(88.5% 0.018 219.7)
-
Step 300
300
#ACC6CF
oklch(81% 0.031 220.7)
-
Step 400
400
#7FA8B6
oklch(70.7% 0.049 220.9)
-
Step 500
500
#5C93A4
oklch(63.1% 0.063 219.5)
-
Step 600
600
#417D8F
oklch(55.7% 0.068 219.7)
-
Step 700
700 (this color)
#366D7E
oklch(50.4% 0.064 220.5)
-
Step 800
800
#2A5663
oklch(42.7% 0.053 219.5)
-
Step 900
900
#274751
oklch(37.8% 0.041 220.1)
-
Step 950
950
#17292F
oklch(26.8% 0.026 221)
#366D7E 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) | #636A7F | 0.054 |
| Deuteranopia (no green cones) | #58627E | 0.049 |
| Tritanopia (no blue cones) | #007372 | 0.041 |
| Achromatopsia (no color) | #666666 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366D7E
#366D7E
oklch(50.4% 0.064 220.5)
- #845848
#845848
oklch(50.4% 0.064 40.8)
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 #366D7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.036
- Deep Aqua #08787F ΔE 0.038
- Deep Turquoise #017374 ΔE 0.038
- Sea Blue #047495 ΔE 0.040
- Metallic Blue #4F738E ΔE 0.042
- Dark Aquamarine #017371 ΔE 0.042
- Denim #3B638C ΔE 0.043
- Dark Aqua #05696B ΔE 0.045
Use #366D7E 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.