#289DC5
Closest named color: Turquoise Blue (#06B1C4). oklch(65.1% 0.114 226.5), rgb(40, 157, 197).
Aa
Black text reads best on this color (6.71:1).
About this color
#289DC5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.114 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.058 away. Black text reads best on it, at 6.71:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #289DC5 |
| RGB | rgb(40, 157, 197) |
| HSL | hsl(195, 66%, 46%) |
| OKLCH | oklch(65.1% 0.114 226.5) |
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 #289DC5 | 3.12:1 | AA large text | Lc -63.3 | Content text, not long reading |
| Black text on #289DC5 | 6.71:1 | AA | Lc 46.2 | Large or bold text, headings |
| #289DC5 text on white | 3.12:1 | AA large text | Lc 57.9 | Large or bold text, headings |
| #289DC5 text on black | 6.71:1 | AA | Lc -43.9 | 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
#DFECF2
oklch(93.5% 0.016 227)
-
Step 200
200
#C5DEE9
oklch(88.6% 0.031 226.1)
-
Step 300
300
#9BC9DD
oklch(81% 0.056 226.4)
-
Step 400
400
#5EACCC
oklch(70.7% 0.09 226.9)
-
Step 500
500 (this color)
#289DC5
oklch(65.1% 0.114 226.5)
-
Step 600
600
#007FA3
oklch(55.6% 0.107 226.4)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#005771
oklch(42.6% 0.082 226.6)
-
Step 900
900
#00495F
oklch(37.8% 0.072 226.2)
-
Step 950
950
#052B38
oklch(27% 0.047 225.8)
#289DC5 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) | #879AC7 | 0.084 |
| Deuteranopia (no green cones) | #738BC5 | 0.075 |
| Tritanopia (no blue cones) | #00A9AA | 0.062 |
| Achromatopsia (no color) | #929292 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #289DC5
#289DC5
oklch(65.1% 0.114 226.5)
- #C87850
#C87850
oklch(65.1% 0.114 46.6)
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 #289DC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.058
- Blue NCS #118AB2 ΔE 0.059
- Faded Blue #658CBB ΔE 0.059
- Cadet Blue #5F9EA0 ΔE 0.065
- Dusty Blue #5A86AD ΔE 0.069
- Cool Blue #4984B8 ΔE 0.069
- Water Blue #0E87CC ΔE 0.069
- Greyblue #77A1B5 ΔE 0.069
Use #289DC5 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.