#25557C
Closest named color: Deep Sea Blue (#015482). oklch(43.5% 0.083 245.9), rgb(37, 85, 124).
Aa
White text reads best on this color (7.86:1).
About this color
#25557C is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.083 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.021 away. White text reads best on it, at 7.86:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.66:1 |
| White text | 7.86:1 |
Values
| HEX | #25557C |
| RGB | rgb(37, 85, 124) |
| HSL | hsl(207, 54%, 32%) |
| OKLCH | oklch(43.5% 0.083 245.9) |
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 #25557C | 7.86:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #25557C | 2.66:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #25557C text on white | 7.86:1 | AAA | Lc 87.1 | Fine for body text |
| #25557C text on black | 2.66:1 | Fails | Lc -15.0 | 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 800.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CBDBEA
oklch(88.4% 0.027 246.4)
-
Step 300
300
#A8C4DF
oklch(80.8% 0.049 247.5)
-
Step 400
400
#78A6CE
oklch(70.7% 0.077 245.4)
-
Step 500
500
#538FC2
oklch(63.1% 0.1 245.9)
-
Step 600
600
#3678AE
oklch(55.5% 0.108 246.2)
-
Step 700
700
#286596
oklch(49.1% 0.1 246.2)
-
Step 800
800 (this color)
#25557C
oklch(43.5% 0.083 245.9)
-
Step 900
900
#224562
oklch(37.8% 0.064 245.6)
-
Step 950
950
#142839
oklch(26.9% 0.041 245.8)
#25557C 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) | #44567E | 0.035 |
| Deuteranopia (no green cones) | #384E7B | 0.026 |
| Tritanopia (no blue cones) | #005E63 | 0.061 |
| Achromatopsia (no color) | #525252 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25557C
#25557C
oklch(43.5% 0.083 245.9)
- #704717
#704717
oklch(43.6% 0.083 66.1)
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 #25557C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.025
- Light Navy #155084 ΔE 0.026
- Dusk Blue #26538D ΔE 0.030
- YInMn Blue #415A77 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.047
- Dusk #4E5481 ΔE 0.050
- Petrol #005F6A ΔE 0.052
Use #25557C 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.