#17859E
Closest named color: Teal Blue (#01889F). oklch(57.1% 0.098 218.2), rgb(23, 133, 158).
Aa
Black text reads best on this color (4.88:1).
About this color
#17859E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.098 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.009 away. Black text reads best on it, at 4.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #17859E |
| RGB | rgb(23, 133, 158) |
| HSL | hsl(191, 75%, 35%) |
| OKLCH | oklch(57.1% 0.098 218.2) |
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 #17859E | 4.29:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #17859E | 4.88:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #17859E text on white | 4.29:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #17859E text on black | 4.88:1 | AA | Lc -32.4 | 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
#C8DDE4
oklch(88.4% 0.024 219.7)
-
Step 300
300
#A2C8D4
oklch(80.9% 0.044 219)
-
Step 400
400
#6CACBE
oklch(70.8% 0.071 217.6)
-
Step 500
500
#3E96AE
oklch(63% 0.09 218.9)
-
Step 600
600 (this color)
#17859E
oklch(57.1% 0.098 218.2)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#05586A
oklch(42.6% 0.075 218.4)
-
Step 900
900
#144956
oklch(37.7% 0.058 217.6)
-
Step 950
950
#0E2B33
oklch(27.1% 0.037 218.8)
#17859E 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) | #75819F | 0.083 |
| Deuteranopia (no green cones) | #64759E | 0.074 |
| Tritanopia (no blue cones) | #008D8D | 0.042 |
| Achromatopsia (no color) | #7A7A7A | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17859E
#17859E
oklch(57.1% 0.098 218.2)
- #A9624C
#A9624C
oklch(57.1% 0.098 38)
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 #17859E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.009
- Blue NCS #118AB2 ΔE 0.031
- Ocean #017B92 ΔE 0.034
- Cerulean #457B9D ΔE 0.037
- Dark Cyan #008B8B ΔE 0.040
- Stormy Blue #507B9C ΔE 0.045
- Teal Green #0A9396 ΔE 0.048
- Teal #008080 ΔE 0.048
Use #17859E 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.