#2D578B
Closest named color: Light Navy Blue (#2E5A88). oklch(45.3% 0.098 254.9), rgb(45, 87, 139).
Aa
White text reads best on this color (7.37:1).
About this color
#2D578B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.098 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.011 away. White text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #2D578B |
| RGB | rgb(45, 87, 139) |
| HSL | hsl(213, 51%, 36%) |
| OKLCH | oklch(45.3% 0.098 254.9) |
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 #2D578B | 7.37:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #2D578B | 2.84:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #2D578B text on white | 7.37:1 | AAA | Lc 85.4 | Fine for body text |
| #2D578B text on black | 2.84:1 | Fails | Lc -16.6 | 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
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A8C3E6
oklch(80.9% 0.058 255)
-
Step 400
400
#79A3D9
oklch(70.6% 0.092 255)
-
Step 500
500
#568CCF
oklch(63.2% 0.117 254.6)
-
Step 600
600
#3A74BC
oklch(55.5% 0.128 255.1)
-
Step 700
700
#2C61A2
oklch(49% 0.119 255.1)
-
Step 800
800 (this color)
#2D578B
oklch(45.3% 0.098 254.9)
-
Step 900
900
#244369
oklch(37.8% 0.075 254.5)
-
Step 950
950
#15273E
oklch(27% 0.049 255.2)
#2D578B 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) | #405B8D | 0.026 |
| Deuteranopia (no green cones) | #33528A | 0.015 |
| Tritanopia (no blue cones) | #00636A | 0.078 |
| Achromatopsia (no color) | #565656 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D578B
#2D578B
oklch(45.3% 0.098 254.9)
- #754D00
#754D00
oklch(45.4% 0.096 74.8)
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 #2D578B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.011
- Dusk Blue #26538D ΔE 0.015
- Denim Blue #3B5B92 ΔE 0.023
- Light Navy #155084 ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.033
- Denim #3B638C ΔE 0.041
- Dusk #4E5481 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.042
Use #2D578B 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.