#2F558A
Closest named color: Dusk Blue (#26538D). oklch(44.8% 0.098 257), rgb(47, 85, 138).
Aa
White text reads best on this color (7.53:1).
About this color
#2F558A is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.098 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.012 away. White text reads best on it, at 7.53:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.78:1 |
| White text | 7.53:1 |
Values
| HEX | #2F558A |
| RGB | rgb(47, 85, 138) |
| HSL | hsl(215, 49%, 36%) |
| OKLCH | oklch(44.8% 0.098 257) |
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 #2F558A | 7.53:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #2F558A | 2.78:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #2F558A text on white | 7.53:1 | AAA | Lc 86.0 | Fine for body text |
| #2F558A text on black | 2.78:1 | Fails | Lc -16.1 | 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
#CCDAEE
oklch(88.4% 0.031 257.2)
-
Step 300
300
#AAC3E6
oklch(81% 0.057 256.8)
-
Step 400
400
#7CA3D9
oklch(70.8% 0.09 256.6)
-
Step 500
500
#5A8BCF
oklch(63.2% 0.116 256.8)
-
Step 600
600
#3F73BC
oklch(55.5% 0.127 257.2)
-
Step 700
700
#3160A2
oklch(49% 0.118 257.3)
-
Step 800
800 (this color)
#2F558A
oklch(44.8% 0.098 257)
-
Step 900
900
#264269
oklch(37.7% 0.075 256.9)
-
Step 950
950
#17273E
oklch(27.1% 0.048 257.5)
#2F558A 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) | #3E598C | 0.022 |
| Deuteranopia (no green cones) | #315089 | 0.014 |
| Tritanopia (no blue cones) | #006169 | 0.079 |
| Achromatopsia (no color) | #545454 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F558A
#2F558A
oklch(44.8% 0.098 257)
- #714D00
#714D00
oklch(44.8% 0.094 77.8)
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 #2F558A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.012
- Light Navy Blue #2E5A88 ΔE 0.016
- Denim Blue #3B5B92 ΔE 0.026
- Light Navy #155084 ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.033
- Twilight #4E518B ΔE 0.040
- Dusk #4E5481 ΔE 0.040
- YInMn Blue #415A77 ΔE 0.043
Use #2F558A 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.