#256D78
Closest named color: Deep Turquoise (#017374). oklch(49.5% 0.072 209.4), rgb(37, 109, 120).
Aa
White text reads best on this color (5.93:1).
About this color
#256D78 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.072 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.025 away. White text reads best on it, at 5.93:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.53:1 |
| White text | 5.93:1 |
Values
| HEX | #256D78 |
| RGB | rgb(37, 109, 120) |
| HSL | hsl(188, 53%, 31%) |
| OKLCH | oklch(49.5% 0.072 209.4) |
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 #256D78 | 5.93:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #256D78 | 3.53:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #256D78 text on white | 5.93:1 | AA | Lc 79.4 | Fine for body text |
| #256D78 text on black | 3.53:1 | AA large text | Lc -22.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CBDDE0
oklch(88.5% 0.02 208.8)
-
Step 300
300
#A8C7CD
oklch(80.9% 0.034 210.7)
-
Step 400
400
#77ABB3
oklch(70.8% 0.056 208)
-
Step 500
500
#5295A1
oklch(63% 0.07 210.4)
-
Step 600
600
#32808C
oklch(55.7% 0.077 209.2)
-
Step 700
700 (this color)
#256D78
oklch(49.5% 0.072 209.4)
-
Step 800
800
#205861
oklch(42.8% 0.059 209.8)
-
Step 900
900
#20484F
oklch(37.6% 0.046 210.4)
-
Step 950
950
#142A2E
oklch(26.9% 0.029 210.5)
#256D78 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) | #636979 | 0.068 |
| Deuteranopia (no green cones) | #576078 | 0.062 |
| Tritanopia (no blue cones) | #007270 | 0.027 |
| Achromatopsia (no color) | #646464 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256D78
#256D78
oklch(49.5% 0.072 209.4)
- #86524A
#86524A
oklch(49.6% 0.072 29.3)
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 #256D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.025
- Dark Aquamarine #017371 ΔE 0.028
- Dark Aqua #05696B ΔE 0.029
- Deep Aqua #08787F ΔE 0.032
- Bluegreen #017A79 ΔE 0.040
- Sea Blue #047495 ΔE 0.045
- Slate #516572 ΔE 0.046
- Ocean #017B92 ΔE 0.050
Use #256D78 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.