#2F559A
Closest named color: Dusk Blue (#26538D). oklch(45.9% 0.121 261.3), rgb(47, 85, 154).
Aa
White text reads best on this color (7.27:1).
About this color
#2F559A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.121 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.024 away. White text reads best on it, at 7.27:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.88:1 |
| White text | 7.27:1 |
Values
| HEX | #2F559A |
| RGB | rgb(47, 85, 154) |
| HSL | hsl(219, 53%, 39%) |
| OKLCH | oklch(45.9% 0.121 261.3) |
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 #2F559A | 7.27:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #2F559A | 2.88:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #2F559A text on white | 7.27:1 | AAA | Lc 85.0 | Fine for body text |
| #2F559A text on black | 2.88:1 | Fails | Lc -17.0 | 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
#A7C2EF
oklch(81% 0.07 260.6)
-
Step 400
400
#79A1E7
oklch(70.8% 0.112 261.2)
-
Step 500
500
#5687E0
oklch(63.1% 0.145 261.4)
-
Step 600
600
#3B6FCE
oklch(55.6% 0.157 261.3)
-
Step 700
700
#2E5CB2
oklch(49% 0.146 261.5)
-
Step 800
800 (this color)
#2F559A
oklch(45.9% 0.121 261.3)
-
Step 900
900
#244073
oklch(37.8% 0.094 261.4)
-
Step 950
950
#152643
oklch(27% 0.059 260.5)
#2F559A 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) | #345C9D | 0.021 |
| Deuteranopia (no green cones) | #215299 | 0.016 |
| Tritanopia (no blue cones) | #006570 | 0.097 |
| Achromatopsia (no color) | #575757 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F559A
#2F559A
oklch(45.9% 0.121 261.3)
- #725100
#725100
oklch(45.8% 0.095 81.4)
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 #2F559A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.024
- Denim Blue #3B5B92 ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.036
- Twilight #4E518B ΔE 0.044
- Dusky Blue #475F94 ΔE 0.045
- Cobalt #1E488F ΔE 0.045
- Light Navy #155084 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.051
Use #2F559A 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.