#258B9D
Closest named color: Teal Blue (#01889F). oklch(58.8% 0.093 212.3), rgb(37, 139, 157).
Aa
Black text reads best on this color (5.25:1).
About this color
#258B9D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.093 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.015 away. Black text reads best on it, at 5.25:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #258B9D |
| RGB | rgb(37, 139, 157) |
| HSL | hsl(189, 62%, 38%) |
| OKLCH | oklch(58.8% 0.093 212.3) |
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 #258B9D | 3.99:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #258B9D | 5.25:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #258B9D text on white | 3.99:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #258B9D text on black | 5.25:1 | AA | Lc -34.8 | 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
#C9DEE2
oklch(88.6% 0.023 210.4)
-
Step 300
300
#A3C8D0
oklch(80.9% 0.041 212.3)
-
Step 400
400
#6EACB9
oklch(70.7% 0.066 212.4)
-
Step 500
500
#4197A8
oklch(63.1% 0.085 212.7)
-
Step 600
600 (this color)
#258B9D
oklch(58.8% 0.093 212.3)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#0A5966
oklch(42.7% 0.071 212.5)
-
Step 900
900
#154953
oklch(37.6% 0.056 213)
-
Step 950
950
#0F2B31
oklch(27% 0.035 213.8)
#258B9D 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) | #7D869E | 0.085 |
| Deuteranopia (no green cones) | #6D7A9D | 0.078 |
| Tritanopia (no blue cones) | #009291 | 0.034 |
| Achromatopsia (no color) | #7F7F7F | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258B9D
#258B9D
oklch(58.8% 0.093 212.3)
- #AD6759
#AD6759
oklch(58.8% 0.093 32.1)
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 #258B9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.015
- Teal Green #0A9396 ΔE 0.030
- Dark Cyan #008B8B ΔE 0.032
- Blue NCS #118AB2 ΔE 0.034
- Cerulean #457B9D ΔE 0.050
- Dusty Teal #4C9085 ΔE 0.050
- Ocean #017B92 ΔE 0.052
- Stormy Blue #507B9C ΔE 0.053
Use #258B9D 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.