#2F538E
Closest named color: Dusk Blue (#26538D). oklch(44.6% 0.106 259.8), rgb(47, 83, 142).
Aa
White text reads best on this color (7.63:1).
About this color
#2F538E is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.106 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.009 away. White text reads best on it, at 7.63:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.74:1 |
| White text | 7.63:1 |
Values
| HEX | #2F538E |
| RGB | rgb(47, 83, 142) |
| HSL | hsl(217, 50%, 37%) |
| OKLCH | oklch(44.6% 0.106 259.8) |
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 #2F538E | 7.63:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #2F538E | 2.74:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #2F538E text on white | 7.63:1 | AAA | Lc 86.3 | Fine for body text |
| #2F538E text on black | 2.74:1 | Fails | Lc -15.8 | 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
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#A9C2E9
oklch(80.9% 0.062 259.2)
-
Step 400
400
#7CA2DE
oklch(70.8% 0.098 259.3)
-
Step 500
500
#5A89D5
oklch(63.1% 0.126 259.6)
-
Step 600
600
#4071C3
oklch(55.5% 0.138 260.1)
-
Step 700
700
#325FA8
oklch(49.2% 0.127 259.6)
-
Step 800
800 (this color)
#2F538E
oklch(44.6% 0.106 259.8)
-
Step 900
900
#26416D
oklch(37.7% 0.083 259.7)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#2F538E 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) | #385890 | 0.019 |
| Deuteranopia (no green cones) | #2A4F8D | 0.013 |
| Tritanopia (no blue cones) | #006069 | 0.087 |
| Achromatopsia (no color) | #535353 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F538E
#2F538E
oklch(44.6% 0.106 259.8)
- #6F4D00
#6F4D00
oklch(44.6% 0.093 79.4)
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 #2F538E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.009
- Light Navy Blue #2E5A88 ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.029
- Light Navy #155084 ΔE 0.030
- Deep Sea Blue #015482 ΔE 0.036
- Cobalt #1E488F ΔE 0.038
- Twilight #4E518B ΔE 0.039
- Dusk #4E5481 ΔE 0.044
Use #2F538E 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.