#252F4F
Closest named color: Prussian Blue (#1D3557). oklch(31.3% 0.059 269.6), rgb(37, 47, 79).
Aa
White text reads best on this color (13.14:1).
About this color
#252F4F is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.059 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.022 away. White text reads best on it, at 13.14:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.59:1 |
| White text | 13.14:1 |
Values
| HEX | #252F4F |
| RGB | rgb(37, 47, 79) |
| HSL | hsl(226, 36%, 23%) |
| OKLCH | oklch(31.3% 0.059 269.6) |
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 #252F4F | 13.14:1 | AAA | Lc -102.6 | Preferred for body text |
| Black text on #252F4F | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #252F4F text on white | 13.14:1 | AAA | Lc 99.4 | Preferred for body text |
| #252F4F text on black | 1.59:1 | 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 950.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F4
oklch(88.6% 0.039 269.4)
-
Step 300
300
#AEBFEF
oklch(80.8% 0.071 269.6)
-
Step 400
400
#859DE7
oklch(70.7% 0.112 269.7)
-
Step 500
500
#6783E0
oklch(63.2% 0.144 269.4)
-
Step 600
600
#506ACD
oklch(55.5% 0.155 269.7)
-
Step 700
700
#4158B2
oklch(49.1% 0.145 269.6)
-
Step 800
800
#354890
oklch(42.6% 0.121 269.6)
-
Step 900
900
#2E3D73
oklch(37.6% 0.094 269.8)
-
Step 950
950 (this color)
#252F4F
oklch(31.3% 0.059 269.6)
#252F4F 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) | #233250 | 0.009 |
| Deuteranopia (no green cones) | #1F2F4E | 0.009 |
| Tritanopia (no blue cones) | #14363B | 0.053 |
| Achromatopsia (no color) | #303030 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252F4F
#252F4F
oklch(31.3% 0.059 269.6)
- #3D2F05
#3D2F05
oklch(31.3% 0.059 89.1)
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 #252F4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.022
- Space Cadet #2B2D42 ΔE 0.024
- Gunmetal #293241 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.041
- Marine #042E60 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.047
- Midnight Green #073B4C ΔE 0.047
- Marine Blue #01386A ΔE 0.055
Use #252F4F 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.