#017D99
Closest named color: Ocean (#017B92). oklch(54.6% 0.1 220.8), rgb(1, 125, 153).
Aa
White text reads best on this color (4.77:1).
About this color
#017D99 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.100 and its hue 221°. 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 4.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.39:1 |
| White text | 4.77:1 |
Values
| HEX | #017D99 |
| RGB | rgb(1, 125, 153) |
| HSL | hsl(191, 99%, 30%) |
| OKLCH | oklch(54.6% 0.1 220.8) |
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 #017D99 | 4.77:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #017D99 | 4.39:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #017D99 text on white | 4.77:1 | AA | Lc 72.6 | Content text, not long reading |
| #017D99 text on black | 4.39:1 | AA large text | Lc -29.1 | 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
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C8DDE5
oklch(88.4% 0.025 222.6)
-
Step 300
300
#A1C8D5
oklch(80.9% 0.045 220.1)
-
Step 400
400
#6CABC0
oklch(70.6% 0.072 221.2)
-
Step 500
500
#3E96B0
oklch(63.1% 0.091 220.6)
-
Step 600
600 (this color)
#017D99
oklch(54.6% 0.1 220.8)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#04586C
oklch(42.7% 0.077 220.6)
-
Step 900
900
#134958
oklch(37.8% 0.06 220.4)
-
Step 950
950
#0E2B33
oklch(27.1% 0.037 218.8)
#017D99 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) | #6C799A | 0.081 |
| Deuteranopia (no green cones) | #5B6D99 | 0.072 |
| Tritanopia (no blue cones) | #008686 | 0.047 |
| Achromatopsia (no color) | #727272 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #017D99
#017D99
oklch(54.6% 0.1 220.8)
- #A15B41
#A15B41
oklch(54.6% 0.1 40.9)
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 #017D99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.011
- Sea Blue #047495 ΔE 0.027
- Teal Blue #01889F ΔE 0.033
- Cerulean #457B9D ΔE 0.037
- Ocean Blue #03719C ΔE 0.038
- Nice Blue #107AB0 ΔE 0.041
- Deep Aqua #08787F ΔE 0.041
- Teal #008080 ΔE 0.044
Use #017D99 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.