#25436F
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.084 257.9), rgb(37, 67, 111).
Aa
White text reads best on this color (9.94:1).
About this color
#25436F is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.084 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.026 away. White text reads best on it, at 9.94:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.11:1 |
| White text | 9.94:1 |
Values
| HEX | #25436F |
| RGB | rgb(37, 67, 111) |
| HSL | hsl(216, 50%, 29%) |
| OKLCH | oklch(38.3% 0.084 257.9) |
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 #25436F | 9.94:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #25436F | 2.11:1 | Fails | Lc 11.0 | Not readable |
| #25436F text on white | 9.94:1 | AAA | Lc 92.9 | Preferred for body text |
| #25436F text on black | 2.11:1 | Fails | Lc -9.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAF1
oklch(88.4% 0.036 258.9)
-
Step 300
300
#A8C2EA
oklch(80.8% 0.064 258.9)
-
Step 400
400
#79A2DF
oklch(70.7% 0.101 258.1)
-
Step 500
500
#568AD6
oklch(63.1% 0.128 257.8)
-
Step 600
600
#3A72C3
oklch(55.5% 0.139 257.8)
-
Step 700
700
#2D5FA9
oklch(49% 0.13 258.3)
-
Step 800
800
#264E89
oklch(42.7% 0.108 258.2)
-
Step 900
900 (this color)
#25436F
oklch(38.3% 0.084 257.9)
-
Step 950
950
#152740
oklch(27.1% 0.053 256.9)
#25436F 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) | #304671 | 0.017 |
| Deuteranopia (no green cones) | #253F6E | 0.012 |
| Tritanopia (no blue cones) | #004D53 | 0.070 |
| Achromatopsia (no color) | #434343 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25436F
#25436F
oklch(38.3% 0.084 257.9)
- #5A3D00
#5A3D00
oklch(38.3% 0.08 78.5)
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 #25436F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.038
- Light Navy #155084 ΔE 0.047
- Marine Blue #01386A ΔE 0.048
- Charcoal #264653 ΔE 0.052
- Cobalt #1E488F ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.057
Use #25436F 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.