#259DBF
Closest named color: Turquoise Blue (#06B1C4). oklch(64.8% 0.111 222.2), rgb(37, 157, 191).
Aa
Black text reads best on this color (6.65:1).
About this color
#259DBF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.111 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.056 away. Black text reads best on it, at 6.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.65:1 |
| White text | 3.15:1 |
Values
| HEX | #259DBF |
| RGB | rgb(37, 157, 191) |
| HSL | hsl(193, 68%, 45%) |
| OKLCH | oklch(64.8% 0.111 222.2) |
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 #259DBF | 3.15:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #259DBF | 6.65:1 | AA | Lc 45.8 | Large or bold text, headings |
| #259DBF text on white | 3.15:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #259DBF text on black | 6.65:1 | AA | Lc -43.5 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFECF1
oklch(93.5% 0.015 222.7)
-
Step 200
200
#C5DEE8
oklch(88.5% 0.03 223.8)
-
Step 300
300
#9BC9DA
oklch(80.9% 0.054 222.6)
-
Step 400
400
#5EADC8
oklch(70.8% 0.087 222.5)
-
Step 500
500 (this color)
#259DBF
oklch(64.8% 0.111 222.2)
-
Step 600
600
#00809E
oklch(55.6% 0.103 221.9)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#00495C
oklch(37.6% 0.07 222.6)
-
Step 950
950
#052B36
oklch(26.9% 0.045 221.8)
#259DBF 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) | #8999C1 | 0.089 |
| Deuteranopia (no green cones) | #758BBF | 0.078 |
| Tritanopia (no blue cones) | #00A8A8 | 0.055 |
| Achromatopsia (no color) | #919191 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #259DBF
#259DBF
oklch(64.8% 0.111 222.2)
- #C77756
#C77756
oklch(64.9% 0.111 42.9)
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 #259DBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.056
- Blue NCS #118AB2 ΔE 0.057
- Cadet Blue #5F9EA0 ΔE 0.059
- Faded Blue #658CBB ΔE 0.062
- Teal Green #0A9396 ΔE 0.065
- Sea #3C9992 ΔE 0.066
- Dusty Blue #5A86AD ΔE 0.068
- Greyblue #77A1B5 ΔE 0.069
Use #259DBF 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.