#179EBB
Closest named color: Turquoise Blue (#06B1C4). oklch(64.7% 0.112 217.7), rgb(23, 158, 187).
Aa
Black text reads best on this color (6.64:1).
About this color
#179EBB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.112 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.053 away. Black text reads best on it, at 6.64:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.64:1 |
| White text | 3.16:1 |
Values
| HEX | #179EBB |
| RGB | rgb(23, 158, 187) |
| HSL | hsl(191, 78%, 41%) |
| OKLCH | oklch(64.7% 0.112 217.7) |
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 #179EBB | 3.16:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #179EBB | 6.64:1 | AA | Lc 45.8 | Large or bold text, headings |
| #179EBB text on white | 3.16:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #179EBB text on black | 6.64:1 | AA | Lc -43.5 | 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 500.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFEDF1
oklch(93.7% 0.016 216.7)
-
Step 200
200
#C4DFE7
oklch(88.6% 0.031 217.5)
-
Step 300
300
#99CAD8
oklch(80.9% 0.055 217.2)
-
Step 400
400
#5AAEC5
oklch(70.7% 0.088 218)
-
Step 500
500 (this color)
#179EBB
oklch(64.7% 0.112 217.7)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#032C35
oklch(27.1% 0.046 216.4)
#179EBB 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) | #8B99BD | 0.096 |
| Deuteranopia (no green cones) | #778ABB | 0.087 |
| Tritanopia (no blue cones) | #00A8A7 | 0.049 |
| Achromatopsia (no color) | #919191 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #179EBB
#179EBB
oklch(64.7% 0.112 217.7)
- #C8745B
#C8745B
oklch(64.6% 0.112 37.4)
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 #179EBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.053
- Cadet Blue #5F9EA0 ΔE 0.056
- Blue NCS #118AB2 ΔE 0.058
- Teal Green #0A9396 ΔE 0.059
- Sea #3C9992 ΔE 0.060
- Persian Green #2A9D8F ΔE 0.066
- Faded Blue #658CBB ΔE 0.068
- Blue Green #0F9B8E ΔE 0.068
Use #179EBB 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.