#17899B
Closest named color: Teal Blue (#01889F). oklch(58% 0.096 211.7), rgb(23, 137, 155).
Aa
Black text reads best on this color (5.08:1).
About this color
#17899B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.096 and its hue 212°. 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 5.08:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.08:1 |
| White text | 4.12:1 |
Values
| HEX | #17899B |
| RGB | rgb(23, 137, 155) |
| HSL | hsl(188, 74%, 35%) |
| OKLCH | oklch(58% 0.096 211.7) |
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 #17899B | 4.12:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #17899B | 5.08:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #17899B text on white | 4.12:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #17899B text on black | 5.08:1 | AA | Lc -33.7 | 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
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE2
oklch(88.5% 0.024 209.8)
-
Step 300
300
#A1C9D1
oklch(81% 0.044 211.2)
-
Step 400
400
#6BADBA
oklch(70.8% 0.07 211.5)
-
Step 500
500
#3C98A8
oklch(63.2% 0.089 211)
-
Step 600
600 (this color)
#17899B
oklch(58% 0.096 211.7)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#015966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#124A53
oklch(37.8% 0.058 210.5)
-
Step 950
950
#0D2B31
oklch(27% 0.037 212.9)
#17899B 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) | #7B849C | 0.089 |
| Deuteranopia (no green cones) | #6A789B | 0.080 |
| Tritanopia (no blue cones) | #00908F | 0.033 |
| Achromatopsia (no color) | #7D7D7D | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17899B
#17899B
oklch(58% 0.096 211.7)
- #AC6456
#AC6456
oklch(58.1% 0.096 31.9)
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 #17899B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.009
- Dark Cyan #008B8B ΔE 0.029
- Teal Green #0A9396 ΔE 0.034
- Blue NCS #118AB2 ΔE 0.036
- Ocean #017B92 ΔE 0.043
- Teal #008080 ΔE 0.046
- Cerulean #457B9D ΔE 0.048
- Stormy Blue #507B9C ΔE 0.053
Use #17899B 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.