#2F509E
Closest named color: Dusk Blue (#26538D). oklch(45% 0.133 264.4), rgb(47, 80, 158).
Aa
White text reads best on this color (7.60:1).
About this color
#2F509E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.133 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.032 away. White text reads best on it, at 7.60:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.76:1 |
| White text | 7.60:1 |
Values
| HEX | #2F509E |
| RGB | rgb(47, 80, 158) |
| HSL | hsl(222, 54%, 40%) |
| OKLCH | oklch(45% 0.133 264.4) |
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 #2F509E | 7.60:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #2F509E | 2.76:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #2F509E text on white | 7.60:1 | AAA | Lc 86.1 | Fine for body text |
| #2F509E text on black | 2.76:1 | Fails | Lc -16.0 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBD9F7
oklch(88.4% 0.044 265.6)
-
Step 300
300
#A8C1F4
oklch(81% 0.078 264.3)
-
Step 400
400
#7A9FEE
oklch(70.8% 0.123 264.4)
-
Step 500
500
#5884E8
oklch(63% 0.158 264.4)
-
Step 600
600
#3F6BD7
oklch(55.6% 0.173 264.7)
-
Step 700
700
#3159BA
oklch(49.1% 0.16 264.4)
-
Step 800
800 (this color)
#2F509E
oklch(45% 0.133 264.4)
-
Step 900
900
#253E78
oklch(37.7% 0.104 264.4)
-
Step 950
950
#162546
oklch(27.1% 0.065 264.1)
#2F509E 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) | #2559A1 | 0.025 |
| Deuteranopia (no green cones) | #054F9C | 0.028 |
| Tritanopia (no blue cones) | #00626F | 0.107 |
| Achromatopsia (no color) | #545454 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F509E
#2F509E
oklch(45% 0.133 264.4)
- #6D5000
#6D5000
oklch(45% 0.092 84.4)
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 #2F509E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.032
- Cobalt #1E488F ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.043
- Blueberry #464196 ΔE 0.046
- Light Navy #155084 ΔE 0.050
- Twilight #4E518B ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.058
Use #2F509E 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.