#289FB7
Closest named color: Cadet Blue (#5F9EA0). oklch(65% 0.105 214.9), rgb(40, 159, 183).
Aa
Black text reads best on this color (6.73:1).
About this color
#289FB7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.105 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.047 away. Black text reads best on it, at 6.73:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.73:1 |
| White text | 3.11:1 |
Values
| HEX | #289FB7 |
| RGB | rgb(40, 159, 183) |
| HSL | hsl(190, 64%, 44%) |
| OKLCH | oklch(65% 0.105 214.9) |
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 #289FB7 | 3.11:1 | AA large text | Lc -63.2 | Content text, not long reading |
| Black text on #289FB7 | 6.73:1 | AA | Lc 46.3 | Large or bold text, headings |
| #289FB7 text on white | 3.11:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #289FB7 text on black | 6.73:1 | AA | Lc -44.0 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#DFEDF0
oklch(93.7% 0.015 212)
-
Step 200
200
#C5DEE5
oklch(88.4% 0.028 216.4)
-
Step 300
300
#9BCAD5
oklch(80.9% 0.052 213.7)
-
Step 400
400
#5FAEC1
oklch(70.8% 0.082 215.2)
-
Step 500
500 (this color)
#289FB7
oklch(65% 0.105 214.9)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#052C34
oklch(27.1% 0.044 214.8)
#289FB7 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) | #8E9AB8 | 0.093 |
| Deuteranopia (no green cones) | #7B8CB7 | 0.084 |
| Tritanopia (no blue cones) | #00A8A6 | 0.043 |
| Achromatopsia (no color) | #929292 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #289FB7
#289FB7
oklch(65% 0.105 214.9)
- #C67763
#C67763
oklch(65% 0.104 35)
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 #289FB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.047
- Turquoise Blue #06B1C4 ΔE 0.050
- Sea #3C9992 ΔE 0.053
- Teal Green #0A9396 ΔE 0.057
- Persian Green #2A9D8F ΔE 0.060
- Blue NCS #118AB2 ΔE 0.063
- Blue Green #0F9B8E ΔE 0.063
- Greyblue #77A1B5 ΔE 0.065
Use #289FB7 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.