#2F528B
Closest named color: Dusk Blue (#26538D). oklch(44.2% 0.103 259.7), rgb(47, 82, 139).
Aa
White text reads best on this color (7.77:1).
About this color
#2F528B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.103 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 7.77:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.70:1 |
| White text | 7.77:1 |
Values
| HEX | #2F528B |
| RGB | rgb(47, 82, 139) |
| HSL | hsl(217, 49%, 36%) |
| OKLCH | oklch(44.2% 0.103 259.7) |
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 #2F528B | 7.77:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #2F528B | 2.70:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #2F528B text on white | 7.77:1 | AAA | Lc 86.8 | Fine for body text |
| #2F528B text on black | 2.70:1 | Fails | Lc -15.3 | 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
#AAC2E8
oklch(80.9% 0.06 259.5)
-
Step 400
400
#7DA2DD
oklch(70.8% 0.096 259.5)
-
Step 500
500
#5C89D3
oklch(63.1% 0.123 259.9)
-
Step 600
600
#4272C0
oklch(55.7% 0.132 259.6)
-
Step 700
700
#335FA6
oklch(49.1% 0.124 259.5)
-
Step 800
800 (this color)
#2F528B
oklch(44.2% 0.103 259.7)
-
Step 900
900
#27416C
oklch(37.7% 0.081 260)
-
Step 950
950
#17263F
oklch(26.9% 0.051 260.2)
#2F528B 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) | #39578D | 0.020 |
| Deuteranopia (no green cones) | #2B4E8A | 0.013 |
| Tritanopia (no blue cones) | #005F67 | 0.086 |
| Achromatopsia (no color) | #525252 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F528B
#2F528B
oklch(44.2% 0.103 259.7)
- #6D4C00
#6D4C00
oklch(44.1% 0.091 79.9)
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 #2F528B, 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
- Light Navy #155084 ΔE 0.026
- Denim Blue #3B5B92 ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.033
- Cobalt #1E488F ΔE 0.037
- Twilight #4E518B ΔE 0.040
- Dusk #4E5481 ΔE 0.044
Use #2F528B 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.