#01798B
Closest named color: Ocean (#017B92). oklch(52.9% 0.092 212.7), rgb(1, 121, 139).
Aa
White text reads best on this color (5.11:1).
About this color
#01798B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.092 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.011 away. White text reads best on it, at 5.11:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #01798B |
| RGB | rgb(1, 121, 139) |
| HSL | hsl(188, 99%, 27%) |
| OKLCH | oklch(52.9% 0.092 212.7) |
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 #01798B | 5.11:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #01798B | 4.10:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #01798B text on white | 5.11:1 | AA | Lc 74.7 | Content text, not long reading |
| #01798B text on black | 4.10:1 | AA large text | Lc -27.0 | 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
#C9DDE2
oklch(88.4% 0.022 214.4)
-
Step 300
300
#A3C8D1
oklch(80.9% 0.041 214.2)
-
Step 400
400
#6EACB9
oklch(70.7% 0.066 212.4)
-
Step 500
500
#4297A8
oklch(63.1% 0.085 212.8)
-
Step 600
600 (this color)
#01798B
oklch(52.9% 0.092 212.7)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#0B5966
oklch(42.7% 0.071 212.6)
-
Step 900
900
#164953
oklch(37.7% 0.055 213.2)
-
Step 950
950
#0F2B31
oklch(27% 0.035 213.8)
#01798B 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) | #6B748C | 0.084 |
| Deuteranopia (no green cones) | #5B698B | 0.075 |
| Tritanopia (no blue cones) | #00807F | 0.033 |
| Achromatopsia (no color) | #6E6E6E | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01798B
#01798B
oklch(52.9% 0.092 212.7)
- #995648
#995648
oklch(52.8% 0.092 32.8)
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 #01798B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.011
- Deep Aqua #08787F ΔE 0.019
- Sea Blue #047495 ΔE 0.025
- Bluegreen #017A79 ΔE 0.030
- Teal #008080 ΔE 0.032
- Deep Turquoise #017374 ΔE 0.037
- Dark Aquamarine #017371 ΔE 0.042
- Ocean Blue #03719C ΔE 0.042
Use #01798B 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.