#257369
Closest named color: Dark Aquamarine (#017371). oklch(50.6% 0.076 183.1), rgb(37, 115, 105).
Aa
White text reads best on this color (5.62:1).
About this color
#257369 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.076 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.017 away. White text reads best on it, at 5.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #257369 |
| RGB | rgb(37, 115, 105) |
| HSL | hsl(172, 51%, 30%) |
| OKLCH | oklch(50.6% 0.076 183.1) |
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 #257369 | 5.62:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #257369 | 3.73:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #257369 text on white | 5.62:1 | AA | Lc 77.8 | Fine for body text |
| #257369 text on black | 3.73:1 | AA large text | Lc -23.9 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CBDEDA
oklch(88.5% 0.021 181.8)
-
Step 300
300
#A7C9C3
oklch(80.9% 0.037 183.5)
-
Step 400
400
#76ADA4
oklch(70.7% 0.059 183.3)
-
Step 500
500
#4F998E
oklch(63.2% 0.076 183)
-
Step 600
600
#2E8378
oklch(55.6% 0.082 183.2)
-
Step 700
700 (this color)
#257369
oklch(50.6% 0.076 183.1)
-
Step 800
800
#1D5A52
oklch(42.6% 0.063 183.1)
-
Step 900
900
#1F4A44
oklch(37.7% 0.049 183.3)
-
Step 950
950
#132B28
oklch(26.8% 0.031 185.1)
#257369 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) | #6D6C69 | 0.081 |
| Deuteranopia (no green cones) | #62646A | 0.077 |
| Tritanopia (no blue cones) | #007570 | 0.015 |
| Achromatopsia (no color) | #676767 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257369
#257369
oklch(50.6% 0.076 183.1)
- #895260
#895260
oklch(50.6% 0.075 3.7)
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 #257369, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.017
- Deep Turquoise #017374 ΔE 0.020
- Bluegreen #017A79 ΔE 0.027
- Deep Aqua #08787F ΔE 0.033
- Dark Aqua #05696B ΔE 0.038
- Teal #008080 ΔE 0.044
- Dark Green Blue #1F6357 ΔE 0.052
- Ocean #017B92 ΔE 0.062
Use #257369 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.