#258B84
Closest named color: Dark Cyan (#008B8B). oklch(57.9% 0.09 188.2), rgb(37, 139, 132).
Aa
Black text reads best on this color (5.10:1).
About this color
#258B84 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.090 and its hue 188°. 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 5.10:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.10:1 |
| White text | 4.11:1 |
Values
| HEX | #258B84 |
| RGB | rgb(37, 139, 132) |
| HSL | hsl(176, 58%, 35%) |
| OKLCH | oklch(57.9% 0.09 188.2) |
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 #258B84 | 4.11:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #258B84 | 5.10:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #258B84 text on white | 4.11:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #258B84 text on black | 5.10:1 | AA | Lc -33.7 | 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
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#C9DEDC
oklch(88.4% 0.023 189.8)
-
Step 300
300
#A4CAC5
oklch(81% 0.041 186.6)
-
Step 400
400
#70AEA8
oklch(70.7% 0.065 188.1)
-
Step 500
500
#449A93
oklch(63.2% 0.083 188.1)
-
Step 600
600 (this color)
#258B84
oklch(57.9% 0.09 188.2)
-
Step 700
700
#05706A
oklch(49.2% 0.084 188.3)
-
Step 800
800
#0E5B56
oklch(42.7% 0.07 188.1)
-
Step 900
900
#174B47
oklch(37.7% 0.055 188)
-
Step 950
950
#102C2A
oklch(27.1% 0.034 189.1)
#258B84 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) | #838384 | 0.096 |
| Deuteranopia (no green cones) | #757985 | 0.090 |
| Tritanopia (no blue cones) | #008F89 | 0.013 |
| Achromatopsia (no color) | #7D7D7D | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258B84
#258B84
oklch(57.9% 0.09 188.2)
- #A8636F
#A8636F
oklch(58% 0.09 9)
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 #258B84, 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 0.030
- Dusty Teal #4C9085 ΔE 0.034
- Teal #008080 ΔE 0.037
- Blue Green #0F9B8E ΔE 0.046
- Teal Blue #01889F ΔE 0.046
- Sea #3C9992 ΔE 0.047
- Viridian #1E9167 ΔE 0.053
Use #258B84 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.