#25297B
Closest named color: Midnight Blue (#191970). oklch(33.5% 0.136 274.2), rgb(37, 41, 123).
Aa
White text reads best on this color (12.48:1).
About this color
#25297B is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.136 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.048 away. White text reads best on it, at 12.48:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.68:1 |
| White text | 12.48:1 |
Values
| HEX | #25297B |
| RGB | rgb(37, 41, 123) |
| HSL | hsl(237, 54%, 31%) |
| OKLCH | oklch(33.5% 0.136 274.2) |
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 #25297B | 12.48:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #25297B | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #25297B text on white | 12.48:1 | AAA | Lc 97.9 | Preferred for body text |
| #25297B text on black | 1.68:1 | Fails | Lc 0.0 | Not readable |
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 900.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ADBCFF
oklch(80.8% 0.096 274.3)
-
Step 400
400
#8497FF
oklch(70.7% 0.153 274)
-
Step 500
500
#6878FF
oklch(63.1% 0.199 274.1)
-
Step 600
600
#5259F5
oklch(55.6% 0.228 274.2)
-
Step 700
700
#4448D5
oklch(49.2% 0.211 274.2)
-
Step 800
800
#373CAC
oklch(42.7% 0.175 274.2)
-
Step 900
900 (this color)
#25297B
oklch(33.5% 0.136 274.2)
-
Step 950
950
#1B2050
oklch(27% 0.087 274.5)
#25297B 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) | #00387E | 0.044 |
| Deuteranopia (no green cones) | #003079 | 0.034 |
| Tritanopia (no blue cones) | #003E4E | 0.110 |
| Achromatopsia (no color) | #343434 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25297B
#25297B
oklch(33.5% 0.136 274.2)
- #423600
#423600
oklch(33.6% 0.069 95.2)
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 #25297B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.048
- Marine Blue #01386A ΔE 0.057
- Marine #042E60 ΔE 0.059
- Royal #0C1793 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.075
- Dark Blue #00008B ΔE 0.084
- Dark Slate Blue #483D8B ΔE 0.084
Use #25297B 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.