#258D88
Closest named color: Dark Cyan (#008B8B). oklch(58.5% 0.091 190.2), rgb(37, 141, 136).
Aa
Black text reads best on this color (5.24:1).
About this color
#258D88 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.091 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.014 away. Black text reads best on it, at 5.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.24:1 |
| White text | 4.00:1 |
Values
| HEX | #258D88 |
| RGB | rgb(37, 141, 136) |
| HSL | hsl(177, 58%, 35%) |
| OKLCH | oklch(58.5% 0.091 190.2) |
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 #258D88 | 4.00:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #258D88 | 5.24:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #258D88 text on white | 4.00:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #258D88 text on black | 5.24:1 | AA | Lc -34.7 | 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 600.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C9DEDC
oklch(88.4% 0.023 189.8)
-
Step 300
300
#A3CAC6
oklch(81% 0.042 188.7)
-
Step 400
400
#6FAEAA
oklch(70.7% 0.065 190.7)
-
Step 500
500
#429A95
oklch(63.2% 0.084 190.1)
-
Step 600
600 (this color)
#258D88
oklch(58.5% 0.091 190.2)
-
Step 700
700
#00706B
oklch(49.2% 0.085 189.4)
-
Step 800
800
#0B5B58
oklch(42.7% 0.07 190.8)
-
Step 900
900
#164B48
oklch(37.8% 0.055 189.8)
-
Step 950
950
#0F2C2A
oklch(27% 0.035 189.2)
#258D88 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) | #858588 | 0.097 |
| Deuteranopia (no green cones) | #767A89 | 0.092 |
| Tritanopia (no blue cones) | #00918B | 0.013 |
| Achromatopsia (no color) | #7F7F7F | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258D88
#258D88
oklch(58.5% 0.091 190.2)
- #AA646F
#AA646F
oklch(58.4% 0.091 10.1)
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 #258D88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.014
- Teal Green #0A9396 ΔE 0.023
- Dusty Teal #4C9085 ΔE 0.030
- Blue Green #0F9B8E ΔE 0.040
- Sea #3C9992 ΔE 0.041
- Teal #008080 ΔE 0.043
- Teal Blue #01889F ΔE 0.044
- Persian Green #2A9D8F ΔE 0.048
Use #258D88 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.