#017C78
Closest named color: Bluegreen (#017A79). oklch(52.9% 0.091 190.8), rgb(1, 124, 120).
Aa
White text reads best on this color (5.05:1).
About this color
#017C78 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.091 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.007 away. White text reads best on it, at 5.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #017C78 |
| RGB | rgb(1, 124, 120) |
| HSL | hsl(178, 98%, 25%) |
| OKLCH | oklch(52.9% 0.091 190.8) |
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 #017C78 | 5.05:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #017C78 | 4.15:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #017C78 text on white | 5.05:1 | AA | Lc 74.3 | Content text, not long reading |
| #017C78 text on black | 4.15:1 | AA large text | Lc -27.4 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E1ECEC
oklch(93.5% 0.012 197)
-
Step 200
200
#C9DEDC
oklch(88.4% 0.023 189.8)
-
Step 300
300
#A3CAC7
oklch(81% 0.042 190.6)
-
Step 400
400
#6FAEAA
oklch(70.7% 0.065 190.7)
-
Step 500
500
#429A95
oklch(63.2% 0.084 190.1)
-
Step 600
600 (this color)
#017C78
oklch(52.9% 0.091 190.8)
-
Step 700
700
#00706C
oklch(49.2% 0.085 190.4)
-
Step 800
800
#0B5B58
oklch(42.7% 0.07 190.8)
-
Step 900
900
#164B48
oklch(37.8% 0.055 189.8)
-
Step 950
950
#0F2C2A
oklch(27% 0.035 189.2)
#017C78 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) | #747578 | 0.096 |
| Deuteranopia (no green cones) | #656A79 | 0.090 |
| Tritanopia (no blue cones) | #00807B | 0.012 |
| Achromatopsia (no color) | #6F6F6F | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #017C78
#017C78
oklch(52.9% 0.091 190.8)
- #98545F
#98545F
oklch(52.9% 0.091 10.3)
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 #017C78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.007
- Teal #008080 ΔE 0.015
- Deep Aqua #08787F ΔE 0.019
- Deep Turquoise #017374 ΔE 0.028
- Dark Aquamarine #017371 ΔE 0.028
- Ocean #017B92 ΔE 0.043
- Dark Cyan #008B8B ΔE 0.048
- Dark Aqua #05696B ΔE 0.058
Use #017C78 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.