#366E7D
Closest named color: Deep Aqua (#08787F). oklch(50.6% 0.063 217.6), rgb(54, 110, 125).
Aa
White text reads best on this color (5.70:1).
About this color
#366E7D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.063 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.035 away. White text reads best on it, at 5.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.68:1 |
| White text | 5.70:1 |
Values
| HEX | #366E7D |
| RGB | rgb(54, 110, 125) |
| HSL | hsl(193, 40%, 35%) |
| OKLCH | oklch(50.6% 0.063 217.6) |
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 #366E7D | 5.70:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #366E7D | 3.68:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #366E7D text on white | 5.70:1 | AA | Lc 78.4 | Fine for body text |
| #366E7D 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
#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
#ABC6CE
oklch(80.9% 0.031 217.5)
-
Step 400
400
#7EA9B5
oklch(70.8% 0.049 216.8)
-
Step 500
500
#5C93A3
oklch(63.1% 0.063 218.3)
-
Step 600
600
#407D8E
oklch(55.6% 0.068 218.2)
-
Step 700
700 (this color)
#366E7D
oklch(50.6% 0.063 217.6)
-
Step 800
800
#2A5662
oklch(42.7% 0.052 217.8)
-
Step 900
900
#274750
oklch(37.7% 0.041 217.9)
-
Step 950
950
#172A2F
oklch(27.1% 0.026 216.3)
#366E7D 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) | #646B7E | 0.055 |
| Deuteranopia (no green cones) | #59637D | 0.049 |
| Tritanopia (no blue cones) | #007373 | 0.037 |
| Achromatopsia (no color) | #666666 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366E7D
#366E7D
oklch(50.6% 0.063 217.6)
- #85584B
#85584B
oklch(50.6% 0.064 36.8)
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 #366E7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.035
- Deep Turquoise #017374 ΔE 0.036
- Slate #516572 ΔE 0.037
- Dark Aquamarine #017371 ΔE 0.039
- Sea Blue #047495 ΔE 0.041
- Metallic Blue #4F738E ΔE 0.042
- Bluegreen #017A79 ΔE 0.044
- Dark Aqua #05696B ΔE 0.045
Use #366E7D 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.