#01788C
Closest named color: Ocean (#017B92). oklch(52.7% 0.093 214.7), rgb(1, 120, 140).
Aa
White text reads best on this color (5.16:1).
About this color
#01788C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.093 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.012 away. White text reads best on it, at 5.16:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #01788C |
| RGB | rgb(1, 120, 140) |
| HSL | hsl(189, 99%, 28%) |
| OKLCH | oklch(52.7% 0.093 214.7) |
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 #01788C | 5.16:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #01788C | 4.06:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #01788C text on white | 5.16:1 | AA | Lc 75.0 | Fine for body text |
| #01788C text on black | 4.06:1 | AA large text | Lc -26.7 | 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 600.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE3
oklch(88.4% 0.023 217.7)
-
Step 300
300
#A3C8D1
oklch(80.9% 0.041 214.2)
-
Step 400
400
#6EACBA
oklch(70.7% 0.067 213.6)
-
Step 500
500
#4297A9
oklch(63.2% 0.085 213.8)
-
Step 600
600 (this color)
#01788C
oklch(52.7% 0.093 214.7)
-
Step 700
700
#016D7F
oklch(49.2% 0.086 214.3)
-
Step 800
800
#0C5967
oklch(42.8% 0.071 213.9)
-
Step 900
900
#164954
oklch(37.7% 0.056 214.9)
-
Step 950
950
#0F2B31
oklch(27% 0.035 213.8)
#01788C 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) | #6A748D | 0.083 |
| Deuteranopia (no green cones) | #5A688C | 0.075 |
| Tritanopia (no blue cones) | #007F7E | 0.036 |
| Achromatopsia (no color) | #6D6D6D | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01788C
#01788C
oklch(52.7% 0.093 214.7)
- #995646
#995646
oklch(52.7% 0.093 34.4)
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 #01788C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.012
- Deep Aqua #08787F ΔE 0.021
- Sea Blue #047495 ΔE 0.022
- Bluegreen #017A79 ΔE 0.033
- Teal #008080 ΔE 0.036
- Ocean Blue #03719C ΔE 0.038
- Deep Turquoise #017374 ΔE 0.038
- Dark Aquamarine #017371 ΔE 0.043
Use #01788C 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.