#2F4FAA
Closest named color: Dusk Blue (#26538D). oklch(45.7% 0.151 266), rgb(47, 79, 170).
Aa
White text reads best on this color (7.44:1).
About this color
#2F4FAA is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.151 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.051 away. White text reads best on it, at 7.44:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.81:1 |
| White text | 7.44:1 |
Values
| HEX | #2F4FAA |
| RGB | rgb(47, 79, 170) |
| HSL | hsl(224, 57%, 43%) |
| OKLCH | oklch(45.7% 0.151 266) |
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 #2F4FAA | 7.44:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #2F4FAA | 2.81:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #2F4FAA text on white | 7.44:1 | AAA | Lc 85.5 | Fine for body text |
| #2F4FAA text on black | 2.81:1 | Fails | Lc -16.6 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6C0FA
oklch(80.9% 0.087 265.8)
-
Step 400
400
#779DF8
oklch(70.8% 0.14 265.8)
-
Step 500
500
#5581F5
oklch(63.1% 0.18 265.8)
-
Step 600
600
#3C67E4
oklch(55.6% 0.196 265.8)
-
Step 700
700
#2F55C6
oklch(49.2% 0.182 265.8)
-
Step 800
800 (this color)
#2F4FAA
oklch(45.7% 0.151 266)
-
Step 900
900
#243C7F
oklch(37.7% 0.117 266.1)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#2F4FAA 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) | #0E5BAD | 0.034 |
| Deuteranopia (no green cones) | #0050A8 | 0.028 |
| Tritanopia (no blue cones) | #006575 | 0.121 |
| Achromatopsia (no color) | #555555 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4FAA
#2F4FAA
oklch(45.7% 0.151 266)
- #6E5300
#6E5300
oklch(45.8% 0.094 86.8)
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 #2F4FAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.051
- Blueberry #464196 ΔE 0.051
- Cobalt #1E488F ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.057
- Blue Blue #2242C7 ΔE 0.058
- Sapphire #2138AB ΔE 0.060
- Twilight #4E518B ΔE 0.064
- Light Navy Blue #2E5A88 ΔE 0.068
Use #2F4FAA 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.