#2D5799
Closest named color: Dusk Blue (#26538D). oklch(46.2% 0.118 259.1), rgb(45, 87, 153).
Aa
White text reads best on this color (7.15:1).
About this color
#2D5799 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.118 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.023 away. White text reads best on it, at 7.15:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #2D5799 |
| RGB | rgb(45, 87, 153) |
| HSL | hsl(217, 55%, 39%) |
| OKLCH | oklch(46.2% 0.118 259.1) |
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 #2D5799 | 7.15:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #2D5799 | 2.93:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #2D5799 text on white | 7.15:1 | AAA | Lc 84.5 | Fine for body text |
| #2D5799 text on black | 2.93:1 | Fails | Lc -17.4 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ABC2E6
oklch(80.9% 0.057 259.3)
-
Step 400
400
#7EA2D9
oklch(70.7% 0.09 258.7)
-
Step 500
500
#5D8ACF
oklch(63.1% 0.116 258.7)
-
Step 600
600
#4472BC
oklch(55.5% 0.126 259.5)
-
Step 700
700 (this color)
#2D5799
oklch(46.2% 0.118 259.1)
-
Step 800
800
#2C4E84
oklch(42.6% 0.099 259.3)
-
Step 900
900
#284169
oklch(37.6% 0.076 259.4)
-
Step 950
950
#18273E
oklch(27.2% 0.048 258.7)
#2D5799 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) | #385D9C | 0.022 |
| Deuteranopia (no green cones) | #265398 | 0.014 |
| Tritanopia (no blue cones) | #006670 | 0.094 |
| Achromatopsia (no color) | #585858 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D5799
#2D5799
oklch(46.2% 0.118 259.1)
- #755100
#755100
oklch(46.2% 0.096 79)
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 #2D5799, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.023
- Denim Blue #3B5B92 ΔE 0.024
- Light Navy Blue #2E5A88 ΔE 0.031
- Dusky Blue #475F94 ΔE 0.041
- Twilight #4E518B ΔE 0.045
- Light Navy #155084 ΔE 0.045
- Denim #3B638C ΔE 0.048
- Cobalt #1E488F ΔE 0.048
Use #2D5799 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.