#366E83
Closest named color: Sea Blue (#047495). oklch(50.9% 0.068 225.1), rgb(54, 110, 131).
Aa
White text reads best on this color (5.65:1).
About this color
#366E83 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.068 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.034 away. White text reads best on it, at 5.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #366E83 |
| RGB | rgb(54, 110, 131) |
| HSL | hsl(196, 42%, 36%) |
| OKLCH | oklch(50.9% 0.068 225.1) |
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 #366E83 | 5.65:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #366E83 | 3.71:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #366E83 text on white | 5.65:1 | AA | Lc 78.1 | Fine for body text |
| #366E83 text on black | 3.71:1 | AA large text | Lc -23.7 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE2
oklch(88.5% 0.018 223.6)
-
Step 300
300
#ABC6D1
oklch(81% 0.033 224.3)
-
Step 400
400
#7EA8B9
oklch(70.7% 0.052 224.8)
-
Step 500
500
#5B92A8
oklch(63% 0.067 225.4)
-
Step 600
600
#3F7C93
oklch(55.5% 0.072 225.1)
-
Step 700
700 (this color)
#366E83
oklch(50.9% 0.068 225.1)
-
Step 800
800
#295566
oklch(42.6% 0.056 225.7)
-
Step 900
900
#264753
oklch(37.8% 0.044 223.6)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#366E83 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) | #626C84 | 0.052 |
| Deuteranopia (no green cones) | #576383 | 0.047 |
| Tritanopia (no blue cones) | #007475 | 0.043 |
| Achromatopsia (no color) | #676767 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366E83
#366E83
oklch(50.9% 0.068 225.1)
- #865945
#865945
oklch(50.8% 0.067 44.7)
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 #366E83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.034
- Metallic Blue #4F738E ΔE 0.036
- Deep Aqua #08787F ΔE 0.039
- Slate #516572 ΔE 0.039
- Denim #3B638C ΔE 0.040
- Ocean #017B92 ΔE 0.042
- Deep Turquoise #017374 ΔE 0.043
- Ocean Blue #03719C ΔE 0.043
Use #366E83 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.