#2D539C
Closest named color: Dusk Blue (#26538D). oklch(45.5% 0.127 262), rgb(45, 83, 156).
Aa
White text reads best on this color (7.42:1).
About this color
#2D539C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.127 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.026 away. White text reads best on it, at 7.42:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.82:1 |
| White text | 7.42:1 |
Values
| HEX | #2D539C |
| RGB | rgb(45, 83, 156) |
| HSL | hsl(219, 55%, 39%) |
| OKLCH | oklch(45.5% 0.127 262) |
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 #2D539C | 7.42:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #2D539C | 2.82:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #2D539C text on white | 7.42:1 | AAA | Lc 85.5 | Fine for body text |
| #2D539C text on black | 2.82:1 | Fails | Lc -16.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A7C1F1
oklch(80.8% 0.074 262.5)
-
Step 400
400
#77A0EA
oklch(70.7% 0.118 261.7)
-
Step 500
500
#5586E4
oklch(63% 0.152 262.2)
-
Step 600
600
#3A6ED2
oklch(55.6% 0.164 261.9)
-
Step 700
700
#2D5BB6
oklch(49.1% 0.153 262.2)
-
Step 800
800 (this color)
#2D539C
oklch(45.5% 0.127 262)
-
Step 900
900
#233F75
oklch(37.6% 0.099 262.1)
-
Step 950
950
#152545
oklch(26.9% 0.064 262.8)
#2D539C 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) | #2E5B9F | 0.023 |
| Deuteranopia (no green cones) | #17519B | 0.019 |
| Tritanopia (no blue cones) | #006470 | 0.101 |
| Achromatopsia (no color) | #555555 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D539C
#2D539C
oklch(45.5% 0.127 262)
- #705000
#705000
oklch(45.4% 0.094 81.9)
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 #2D539C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.026
- Denim Blue #3B5B92 ΔE 0.035
- Cobalt #1E488F ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.042
- Light Navy #155084 ΔE 0.046
- Twilight #4E518B ΔE 0.048
- Dusky Blue #475F94 ΔE 0.052
- Blueberry #464196 ΔE 0.053
Use #2D539C 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.