#2F558B
Closest named color: Dusk Blue (#26538D). oklch(44.9% 0.099 257.4), rgb(47, 85, 139).
Aa
White text reads best on this color (7.51:1).
About this color
#2F558B is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.099 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.012 away. White text reads best on it, at 7.51:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #2F558B |
| RGB | rgb(47, 85, 139) |
| HSL | hsl(215, 49%, 36%) |
| OKLCH | oklch(44.9% 0.099 257.4) |
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 #2F558B | 7.51:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #2F558B | 2.79:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #2F558B text on white | 7.51:1 | AAA | Lc 85.9 | Fine for body text |
| #2F558B text on black | 2.79:1 | Fails | Lc -16.1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CCDAEF
oklch(88.4% 0.033 258.4)
-
Step 300
300
#A9C2E6
oklch(80.8% 0.058 257.5)
-
Step 400
400
#7CA2DA
oklch(70.6% 0.093 257.9)
-
Step 500
500
#5A8AD0
oklch(63% 0.118 257.8)
-
Step 600
600
#3F73BD
oklch(55.6% 0.128 257.5)
-
Step 700
700
#3160A3
oklch(49% 0.119 257.6)
-
Step 800
800 (this color)
#2F558B
oklch(44.9% 0.099 257.4)
-
Step 900
900
#26426A
oklch(37.8% 0.077 257.4)
-
Step 950
950
#16273E
oklch(27% 0.049 256.3)
#2F558B 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) | #3D598D | 0.021 |
| Deuteranopia (no green cones) | #30518A | 0.011 |
| Tritanopia (no blue cones) | #006169 | 0.081 |
| Achromatopsia (no color) | #545454 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F558B
#2F558B
oklch(44.9% 0.099 257.4)
- #714D00
#714D00
oklch(44.8% 0.094 77.8)
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 #2F558B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.012
- Light Navy Blue #2E5A88 ΔE 0.017
- Denim Blue #3B5B92 ΔE 0.025
- Light Navy #155084 ΔE 0.030
- Deep Sea Blue #015482 ΔE 0.033
- Twilight #4E518B ΔE 0.039
- Dusk #4E5481 ΔE 0.041
- YInMn Blue #415A77 ΔE 0.045
Use #2F558B 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.