#259A8A
Closest named color: Blue Green (#0F9B8E). oklch(62% 0.102 181.4), rgb(37, 154, 138).
Aa
Black text reads best on this color (6.06:1).
About this color
#259A8A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.102 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Green (#0F9B8E), ΔE 0.007 away. Black text reads best on it, at 6.06:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Blue Green (#0F9B8E) |
| Black text | 6.06:1 |
| White text | 3.46:1 |
Values
| HEX | #259A8A |
| RGB | rgb(37, 154, 138) |
| HSL | hsl(172, 61%, 37%) |
| OKLCH | oklch(62% 0.102 181.4) |
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 #259A8A | 3.46:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #259A8A | 6.06:1 | AA | Lc 42.3 | Non-text elements, placeholder text |
| #259A8A text on white | 3.46:1 | AA large text | Lc 61.8 | Content text, not long reading |
| #259A8A text on black | 6.06:1 | AA | Lc -39.9 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E0EDEA
oklch(93.6% 0.014 180.7)
-
Step 200
200
#C6DFDA
oklch(88.4% 0.027 182.3)
-
Step 300
300
#9ECCC2
oklch(81% 0.05 180.2)
-
Step 400
400
#63B1A4
oklch(70.6% 0.08 181.9)
-
Step 500
500 (this color)
#259A8A
oklch(62% 0.102 181.4)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C52
oklch(42.6% 0.076 182.2)
-
Step 900
900
#034D44
oklch(37.8% 0.067 181.5)
-
Step 950
950
#082D28
oklch(27% 0.042 182.3)
#259A8A 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) | #939189 | 0.108 |
| Deuteranopia (no green cones) | #83858B | 0.103 |
| Tritanopia (no blue cones) | #009D95 | 0.016 |
| Achromatopsia (no color) | #8A8A8A | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #259A8A
#259A8A
oklch(62% 0.102 181.4)
- #B96B82
#B96B82
oklch(62.1% 0.103 1.6)
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 #259A8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Green #0F9B8E ΔE 0.007
- Persian Green #2A9D8F ΔE 0.011
- Sea #3C9992 ΔE 0.020
- Ocean Green #3D9973 ΔE 0.033
- Teal Green #0A9396 ΔE 0.033
- Dusty Teal #4C9085 ΔE 0.034
- Grey Teal #5E9B8A ΔE 0.042
- Dull Teal #5F9E8F ΔE 0.047
Use #259A8A 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.