#256F7B
Closest named color: Deep Turquoise (#017374). oklch(50.2% 0.073 210.3), rgb(37, 111, 123).
Aa
White text reads best on this color (5.77:1).
About this color
#256F7B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.073 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.023 away. White text reads best on it, at 5.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #256F7B |
| RGB | rgb(37, 111, 123) |
| HSL | hsl(188, 54%, 31%) |
| OKLCH | oklch(50.2% 0.073 210.3) |
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 #256F7B | 5.77:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #256F7B | 3.63:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #256F7B text on white | 5.77:1 | AA | Lc 78.6 | Fine for body text |
| #256F7B text on black | 3.63:1 | AA large text | Lc -23.2 | 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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CBDDE0
oklch(88.5% 0.02 208.8)
-
Step 300
300
#A7C7CD
oklch(80.8% 0.035 210.2)
-
Step 400
400
#76ABB4
oklch(70.7% 0.057 209.2)
-
Step 500
500
#5096A2
oklch(63.2% 0.073 209.9)
-
Step 600
600
#30808D
oklch(55.7% 0.079 210)
-
Step 700
700 (this color)
#256F7B
oklch(50.2% 0.073 210.3)
-
Step 800
800
#1E5861
oklch(42.7% 0.061 209.4)
-
Step 900
900
#1F4850
oklch(37.6% 0.048 212.1)
-
Step 950
950
#132A2F
oklch(26.9% 0.03 213.4)
#256F7B 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) | #656B7C | 0.069 |
| Deuteranopia (no green cones) | #58627B | 0.062 |
| Tritanopia (no blue cones) | #007473 | 0.027 |
| Achromatopsia (no color) | #666666 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256F7B
#256F7B
oklch(50.2% 0.073 210.3)
- #89534A
#89534A
oklch(50.1% 0.074 30.1)
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 #256F7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.023
- Deep Aqua #08787F ΔE 0.027
- Dark Aquamarine #017371 ΔE 0.027
- Dark Aqua #05696B ΔE 0.034
- Bluegreen #017A79 ΔE 0.036
- Sea Blue #047495 ΔE 0.040
- Ocean #017B92 ΔE 0.043
- Slate #516572 ΔE 0.047
Use #256F7B 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.