#356E78
Closest named color: Deep Turquoise (#017374). oklch(50.4% 0.062 210.4), rgb(53, 110, 120).
Aa
White text reads best on this color (5.74:1).
About this color
#356E78 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.062 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.030 away. White text reads best on it, at 5.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.65:1 |
| White text | 5.74:1 |
Values
| HEX | #356E78 |
| RGB | rgb(53, 110, 120) |
| HSL | hsl(189, 39%, 34%) |
| OKLCH | oklch(50.4% 0.062 210.4) |
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 #356E78 | 5.74:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #356E78 | 3.65:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #356E78 text on white | 5.74:1 | AA | Lc 78.6 | Fine for body text |
| #356E78 text on black | 3.65:1 | AA large text | Lc -23.2 | 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
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ABC6CB
oklch(80.8% 0.03 210.1)
-
Step 400
400
#7EA9B1
oklch(70.6% 0.048 210.3)
-
Step 500
500
#5C949E
oklch(63.2% 0.061 210.1)
-
Step 600
600
#407E89
oklch(55.6% 0.066 210.4)
-
Step 700
700 (this color)
#356E78
oklch(50.4% 0.062 210.4)
-
Step 800
800
#2A575F
oklch(42.8% 0.051 210.5)
-
Step 900
900
#27474D
oklch(37.6% 0.039 210.9)
-
Step 950
950
#172A2D
oklch(27% 0.025 208.4)
#356E78 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) | #656A79 | 0.058 |
| Deuteranopia (no green cones) | #5B6378 | 0.053 |
| Tritanopia (no blue cones) | #007371 | 0.033 |
| Achromatopsia (no color) | #666666 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #356E78
#356E78
oklch(50.4% 0.062 210.4)
- #84574F
#84574F
oklch(50.4% 0.062 30.5)
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 #356E78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.030
- Dark Aquamarine #017371 ΔE 0.033
- Deep Aqua #08787F ΔE 0.033
- Slate #516572 ΔE 0.037
- Dark Aqua #05696B ΔE 0.039
- Bluegreen #017A79 ΔE 0.041
- Sea Blue #047495 ΔE 0.047
- Metallic Blue #4F738E ΔE 0.048
Use #356E78 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.