#25637E
Closest named color: Denim (#3B638C). oklch(47.2% 0.076 230.2), rgb(37, 99, 126).
Aa
White text reads best on this color (6.63:1).
About this color
#25637E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.076 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.032 away. White text reads best on it, at 6.63:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.16:1 |
| White text | 6.63:1 |
Values
| HEX | #25637E |
| RGB | rgb(37, 99, 126) |
| HSL | hsl(198, 55%, 32%) |
| OKLCH | oklch(47.2% 0.076 230.2) |
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 #25637E | 6.63:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #25637E | 3.16:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #25637E text on white | 6.63:1 | AA | Lc 82.6 | Fine for body text |
| #25637E text on black | 3.16:1 | AA large text | Lc -19.4 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A9C6D4
oklch(81% 0.037 228.5)
-
Step 400
400
#7BA8BF
oklch(70.7% 0.059 230.8)
-
Step 500
500
#5792AF
oklch(63.1% 0.075 231)
-
Step 600
600
#397C9A
oklch(55.6% 0.082 230)
-
Step 700
700 (this color)
#25637E
oklch(47.2% 0.076 230.2)
-
Step 800
800
#25556B
oklch(42.6% 0.063 230.6)
-
Step 900
900
#244657
oklch(37.6% 0.049 231.8)
-
Step 950
950
#162933
oklch(26.9% 0.031 232.5)
#25637E 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) | #55627F | 0.052 |
| Deuteranopia (no green cones) | #49597E | 0.045 |
| Tritanopia (no blue cones) | #006A6C | 0.045 |
| Achromatopsia (no color) | #5C5C5C | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25637E
#25637E
oklch(47.2% 0.076 230.2)
- #7E4E33
#7E4E33
oklch(47.3% 0.076 49.5)
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 #25637E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.032
- YInMn Blue #415A77 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.036
- Peacock Blue #016795 ΔE 0.037
- Petrol #005F6A ΔE 0.040
- Dark Aqua #05696B ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.050
- Slate #516572 ΔE 0.050
Use #25637E 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.