#17809B
Closest named color: Ocean (#017B92). oklch(55.7% 0.096 220.7), rgb(23, 128, 155).
Aa
Black text reads best on this color (4.59:1).
About this color
#17809B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.096 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.020 away. Black text reads best on it, at 4.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.59:1 |
| White text | 4.56:1 |
Values
| HEX | #17809B |
| RGB | rgb(23, 128, 155) |
| HSL | hsl(192, 74%, 35%) |
| OKLCH | oklch(55.7% 0.096 220.7) |
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 #17809B | 4.56:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #17809B | 4.59:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #17809B text on white | 4.56:1 | AA | Lc 71.3 | Content text, not long reading |
| #17809B text on black | 4.59:1 | AA | Lc -30.4 | Non-text elements, placeholder text |
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
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A3C8D4
oklch(81% 0.043 219.5)
-
Step 400
400
#6EABBF
oklch(70.7% 0.069 220.7)
-
Step 500
500
#4296AF
oklch(63.2% 0.089 220.4)
-
Step 600
600 (this color)
#17809B
oklch(55.7% 0.096 220.7)
-
Step 700
700
#016C84
oklch(49.2% 0.089 220.3)
-
Step 800
800
#0C586B
oklch(42.7% 0.074 220.2)
-
Step 900
900
#164857
oklch(37.6% 0.058 221.6)
-
Step 950
950
#0F2B33
oklch(27.1% 0.037 219.3)
#17809B 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) | #707C9C | 0.079 |
| Deuteranopia (no green cones) | #5F709B | 0.071 |
| Tritanopia (no blue cones) | #008989 | 0.046 |
| Achromatopsia (no color) | #767676 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17809B
#17809B
oklch(55.7% 0.096 220.7)
- #A35F46
#A35F46
oklch(55.7% 0.097 40.8)
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 #17809B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.020
- Teal Blue #01889F ΔE 0.023
- Cerulean #457B9D ΔE 0.032
- Sea Blue #047495 ΔE 0.037
- Blue NCS #118AB2 ΔE 0.041
- Stormy Blue #507B9C ΔE 0.042
- Nice Blue #107AB0 ΔE 0.042
- Dull Blue #49759C ΔE 0.044
Use #17809B 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.