#289DAF
Closest named color: Sea (#3C9992). oklch(64.2% 0.102 210.4), rgb(40, 157, 175).
Aa
Black text reads best on this color (6.53:1).
About this color
#289DAF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.102 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.042 away. Black text reads best on it, at 6.53:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.53:1 |
| White text | 3.21:1 |
Values
| HEX | #289DAF |
| RGB | rgb(40, 157, 175) |
| HSL | hsl(188, 63%, 42%) |
| OKLCH | oklch(64.2% 0.102 210.4) |
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 #289DAF | 3.21:1 | AA large text | Lc -64.4 | Content text, not long reading |
| Black text on #289DAF | 6.53:1 | AA | Lc 45.1 | Large or bold text, headings |
| #289DAF text on white | 3.21:1 | AA large text | Lc 59.0 | Large or bold text, headings |
| #289DAF text on black | 6.53:1 | AA | Lc -42.7 | 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 500.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0EDEF
oklch(93.7% 0.014 207.9)
-
Step 200
200
#C5DEE3
oklch(88.4% 0.027 211.1)
-
Step 300
300
#9CCAD3
oklch(80.9% 0.05 210.9)
-
Step 400
400
#60AEBC
oklch(70.6% 0.079 210.4)
-
Step 500
500 (this color)
#289DAF
oklch(64.2% 0.102 210.4)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#062C32
oklch(27% 0.042 210.3)
#289DAF 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) | #8E97B0 | 0.095 |
| Deuteranopia (no green cones) | #7C8AAF | 0.087 |
| Tritanopia (no blue cones) | #00A5A2 | 0.036 |
| Achromatopsia (no color) | #8F8F8F | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #289DAF
#289DAF
oklch(64.2% 0.102 210.4)
- #C37467
#C37467
oklch(64.2% 0.102 30.1)
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 #289DAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.042
- Cadet Blue #5F9EA0 ΔE 0.043
- Teal Green #0A9396 ΔE 0.046
- Persian Green #2A9D8F ΔE 0.049
- Blue Green #0F9B8E ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.057
- Dull Teal #5F9E8F ΔE 0.059
- Blue NCS #118AB2 ΔE 0.060
Use #289DAF 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.