#177978
Closest named color: Bluegreen (#017A79). oklch(52.4% 0.084 193.8), rgb(23, 121, 120).
Aa
White text reads best on this color (5.19:1).
About this color
#177978 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.084 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.006 away. White text reads best on it, at 5.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #177978 |
| RGB | rgb(23, 121, 120) |
| HSL | hsl(179, 68%, 28%) |
| OKLCH | oklch(52.4% 0.084 193.8) |
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 #177978 | 5.19:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #177978 | 4.04:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #177978 text on white | 5.19:1 | AA | Lc 75.4 | Fine for body text |
| #177978 text on black | 4.04:1 | AA large text | Lc -26.4 | 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 600.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDD
oklch(88.5% 0.021 193.1)
-
Step 300
300
#A5C9C8
oklch(80.9% 0.038 194.3)
-
Step 400
400
#73ADAB
oklch(70.7% 0.06 193.1)
-
Step 500
500
#4A9897
oklch(63% 0.077 194.3)
-
Step 600
600 (this color)
#177978
oklch(52.4% 0.084 193.8)
-
Step 700
700
#166E6D
oklch(49% 0.078 193.7)
-
Step 800
800
#175A59
oklch(42.7% 0.065 193.5)
-
Step 900
900
#1B4A49
oklch(37.7% 0.051 193.3)
-
Step 950
950
#112B2B
oklch(26.9% 0.032 195.4)
#177978 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) | #717378 | 0.088 |
| Deuteranopia (no green cones) | #636979 | 0.081 |
| Tritanopia (no blue cones) | #007D78 | 0.013 |
| Achromatopsia (no color) | #6D6D6D | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #177978
#177978
oklch(52.4% 0.084 193.8)
- #94555B
#94555B
oklch(52.4% 0.084 14.3)
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 #177978, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.006
- Deep Aqua #08787F ΔE 0.013
- Deep Turquoise #017374 ΔE 0.021
- Teal #008080 ΔE 0.021
- Dark Aquamarine #017371 ΔE 0.022
- Ocean #017B92 ΔE 0.040
- Dark Aqua #05696B ΔE 0.051
- Sea Blue #047495 ΔE 0.054
Use #177978 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.