#2C5399
Closest named color: Dusk Blue (#26538D). oklch(45.2% 0.123 261.1), rgb(44, 83, 153).
Aa
White text reads best on this color (7.48:1).
About this color
#2C5399 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.123 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.021 away. White text reads best on it, at 7.48:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.80:1 |
| White text | 7.48:1 |
Values
| HEX | #2C5399 |
| RGB | rgb(44, 83, 153) |
| HSL | hsl(219, 55%, 39%) |
| OKLCH | oklch(45.2% 0.123 261.1) |
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 #2C5399 | 7.48:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #2C5399 | 2.80:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #2C5399 text on white | 7.48:1 | AAA | Lc 85.7 | Fine for body text |
| #2C5399 text on black | 2.80:1 | Fails | Lc -16.3 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A7C2F0
oklch(81% 0.072 261)
-
Step 400
400
#77A1E8
oklch(70.8% 0.114 260.5)
-
Step 500
500
#5587E1
oklch(63.1% 0.146 261.3)
-
Step 600
600
#396FCF
oklch(55.6% 0.159 260.9)
-
Step 700
700
#2C5CB3
oklch(49% 0.148 261.1)
-
Step 800
800 (this color)
#2C5399
oklch(45.2% 0.123 261.1)
-
Step 900
900
#234074
oklch(37.8% 0.096 261.1)
-
Step 950
950
#152644
oklch(27.1% 0.061 261)
#2C5399 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) | #305A9C | 0.021 |
| Deuteranopia (no green cones) | #1B5098 | 0.018 |
| Tritanopia (no blue cones) | #00636E | 0.098 |
| Achromatopsia (no color) | #555555 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C5399
#2C5399
oklch(45.2% 0.123 261.1)
- #704F00
#704F00
oklch(45.2% 0.093 80.8)
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 #2C5399, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.038
- Cobalt #1E488F ΔE 0.038
- Light Navy #155084 ΔE 0.041
- Twilight #4E518B ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.048
- Dusky Blue #475F94 ΔE 0.051
Use #2C5399 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.