#259CA4
Closest named color: Sea (#3C9992). oklch(63.4% 0.1 201.9), rgb(37, 156, 164).
Aa
Black text reads best on this color (6.37:1).
About this color
#259CA4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.100 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.026 away. Black text reads best on it, at 6.37:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #259CA4 |
| RGB | rgb(37, 156, 164) |
| HSL | hsl(184, 63%, 39%) |
| OKLCH | oklch(63.4% 0.1 201.9) |
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 #259CA4 | 3.29:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #259CA4 | 6.37:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #259CA4 text on white | 3.29:1 | AA large text | Lc 59.9 | Large or bold text, headings |
| #259CA4 text on black | 6.37:1 | AA | Lc -41.8 | 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 500.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C5DFE1
oklch(88.5% 0.028 202.3)
-
Step 300
300
#9CCBCE
oklch(81% 0.049 201.1)
-
Step 400
400
#61AFB5
oklch(70.6% 0.077 202)
-
Step 500
500 (this color)
#259CA4
oklch(63.4% 0.1 201.9)
-
Step 600
600
#00838B
oklch(55.5% 0.095 202.3)
-
Step 700
700
#006E75
oklch(49% 0.083 202.5)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#062C2F
oklch(26.9% 0.041 202.8)
#259CA4 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) | #8F95A5 | 0.100 |
| Deuteranopia (no green cones) | #7E88A4 | 0.093 |
| Tritanopia (no blue cones) | #00A29E | 0.024 |
| Achromatopsia (no color) | #8E8E8E | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #259CA4
#259CA4
oklch(63.4% 0.1 201.9)
- #BF716F
#BF716F
oklch(63.3% 0.099 21.8)
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 #259CA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.026
- Teal Green #0A9396 ΔE 0.033
- Persian Green #2A9D8F ΔE 0.033
- Blue Green #0F9B8E ΔE 0.035
- Cadet Blue #5F9EA0 ΔE 0.042
- Dusty Teal #4C9085 ΔE 0.050
- Dull Teal #5F9E8F ΔE 0.050
- Grey Teal #5E9B8A ΔE 0.051
Use #259CA4 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.