#257491
Closest named color: Sea Blue (#047495). oklch(52.5% 0.087 226.8), rgb(37, 116, 145).
Aa
White text reads best on this color (5.26:1).
About this color
#257491 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.087 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.013 away. White text reads best on it, at 5.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.98:1 |
| White text | 5.26:1 |
Values
| HEX | #257491 |
| RGB | rgb(37, 116, 145) |
| HSL | hsl(196, 59%, 36%) |
| OKLCH | oklch(52.5% 0.087 226.8) |
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 #257491 | 5.26:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #257491 | 3.98:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #257491 text on white | 5.26:1 | AA | Lc 75.9 | Fine for body text |
| #257491 text on black | 3.98:1 | AA large text | Lc -25.9 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A7C6D4
oklch(80.8% 0.039 226.9)
-
Step 400
400
#76A9BF
oklch(70.7% 0.063 226.7)
-
Step 500
500
#5093AF
oklch(63% 0.08 227.3)
-
Step 600
600 (this color)
#257491
oklch(52.5% 0.087 226.8)
-
Step 700
700
#226A84
oklch(49.2% 0.08 226.3)
-
Step 800
800
#1E566B
oklch(42.6% 0.067 226.6)
-
Step 900
900
#1F4757
oklch(37.6% 0.052 226.9)
-
Step 950
950
#132A33
oklch(27.1% 0.033 225.6)
#257491 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) | #647292 | 0.064 |
| Deuteranopia (no green cones) | #566791 | 0.057 |
| Tritanopia (no blue cones) | #007C7E | 0.047 |
| Achromatopsia (no color) | #6C6C6C | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257491
#257491
oklch(52.5% 0.087 226.8)
- #935A3D
#935A3D
oklch(52.5% 0.086 47.2)
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 #257491, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.013
- Ocean #017B92 ΔE 0.022
- Ocean Blue #03719C ΔE 0.025
- Muted Blue #3B719F ΔE 0.032
- Metallic Blue #4F738E ΔE 0.036
- Dull Blue #49759C ΔE 0.037
- Deep Aqua #08787F ΔE 0.037
- Cerulean #457B9D ΔE 0.040
Use #257491 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.