#277178
Closest named color: Deep Turquoise (#017374). oklch(50.7% 0.072 204), rgb(39, 113, 120).
Aa
White text reads best on this color (5.64:1).
About this color
#277178 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.072 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.018 away. White text reads best on it, at 5.64:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.71:1 |
| White text | 5.64:1 |
Values
| HEX | #277178 |
| RGB | rgb(39, 113, 120) |
| HSL | hsl(185, 51%, 31%) |
| OKLCH | oklch(50.7% 0.072 204) |
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 #277178 | 5.64:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #277178 | 3.71:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #277178 text on white | 5.64:1 | AA | Lc 78.0 | Fine for body text |
| #277178 text on black | 3.71:1 | AA large text | Lc -23.8 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A7C8CB
oklch(81% 0.036 203.2)
-
Step 400
400
#77ABB1
oklch(70.7% 0.055 205)
-
Step 500
500
#50969D
oklch(63% 0.071 204)
-
Step 600
600
#308088
oklch(55.5% 0.077 204.4)
-
Step 700
700 (this color)
#277178
oklch(50.7% 0.072 204)
-
Step 800
800
#1E585E
oklch(42.6% 0.06 204.8)
-
Step 900
900
#20494D
oklch(37.8% 0.046 203.9)
-
Step 950
950
#142B2D
oklch(27.1% 0.029 202.9)
#277178 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) | #686C79 | 0.072 |
| Deuteranopia (no green cones) | #5C6378 | 0.067 |
| Tritanopia (no blue cones) | #007673 | 0.024 |
| Achromatopsia (no color) | #676767 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #277178
#277178
oklch(50.7% 0.072 204)
- #8A5451
#8A5451
oklch(50.6% 0.073 23.4)
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 #277178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.018
- Dark Aquamarine #017371 ΔE 0.021
- Deep Aqua #08787F ΔE 0.022
- Bluegreen #017A79 ΔE 0.029
- Dark Aqua #05696B ΔE 0.036
- Ocean #017B92 ΔE 0.043
- Teal #008080 ΔE 0.044
- Sea Blue #047495 ΔE 0.045
Use #277178 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.