#2D558F
Closest named color: Dusk Blue (#26538D). oklch(45% 0.106 257.8), rgb(45, 85, 143).
Aa
White text reads best on this color (7.47:1).
About this color
#2D558F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.106 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.010 away. White text reads best on it, at 7.47:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.80:1 |
| White text | 7.47:1 |
Values
| HEX | #2D558F |
| RGB | rgb(45, 85, 143) |
| HSL | hsl(216, 52%, 37%) |
| OKLCH | oklch(45% 0.106 257.8) |
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 #2D558F | 7.47:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #2D558F | 2.80:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #2D558F text on white | 7.47:1 | AAA | Lc 85.8 | Fine for body text |
| #2D558F 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAF0
oklch(88.4% 0.034 257.9)
-
Step 300
300
#A8C2E9
oklch(80.8% 0.062 258.4)
-
Step 400
400
#79A2DE
oklch(70.6% 0.099 257.8)
-
Step 500
500
#578AD5
oklch(63.1% 0.126 257.9)
-
Step 600
600
#3B72C2
oklch(55.5% 0.138 257.9)
-
Step 700
700
#2D60A8
oklch(49.2% 0.128 257.5)
-
Step 800
800 (this color)
#2D558F
oklch(45% 0.106 257.8)
-
Step 900
900
#24426D
oklch(37.8% 0.082 257.5)
-
Step 950
950
#162740
oklch(27.2% 0.052 257.9)
#2D558F 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) | #3B5A91 | 0.023 |
| Deuteranopia (no green cones) | #2C518E | 0.012 |
| Tritanopia (no blue cones) | #00626B | 0.084 |
| Achromatopsia (no color) | #555555 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D558F
#2D558F
oklch(45% 0.106 257.8)
- #724D00
#724D00
oklch(45% 0.094 77)
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 #2D558F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.010
- Light Navy Blue #2E5A88 ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.025
- Light Navy #155084 ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.036
- Twilight #4E518B ΔE 0.041
- Cobalt #1E488F ΔE 0.042
- Dusky Blue #475F94 ΔE 0.045
Use #2D558F 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.