#505FBA
Closest named color: Iris (#6258C4). oklch(52% 0.143 273.4), rgb(80, 95, 186).
Aa
White text reads best on this color (5.69:1).
About this color
#505FBA is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.143 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.034 away. White text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #505FBA |
| RGB | rgb(80, 95, 186) |
| HSL | hsl(232, 43%, 52%) |
| OKLCH | oklch(52% 0.143 273.4) |
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 #505FBA | 5.69:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #505FBA | 3.68:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #505FBA text on white | 5.69:1 | AA | Lc 78.3 | Fine for body text |
| #505FBA text on black | 3.68:1 | AA large text | Lc -23.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F3
oklch(88.5% 0.038 272.5)
-
Step 300
300
#B2BEEE
oklch(80.9% 0.069 273.8)
-
Step 400
400
#8A9BE6
oklch(70.6% 0.112 273.5)
-
Step 500
500
#6F81DE
oklch(63.1% 0.141 273.5)
-
Step 600
600
#5868CC
oklch(55.6% 0.154 273.5)
-
Step 700
700 (this color)
#505FBA
oklch(52% 0.143 273.4)
-
Step 800
800
#3B478F
oklch(42.7% 0.119 273.2)
-
Step 900
900
#323C72
oklch(37.6% 0.093 273.3)
-
Step 950
950
#1D2443
oklch(27.1% 0.058 272.4)
#505FBA 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) | #326BBD | 0.040 |
| Deuteranopia (no green cones) | #2262B8 | 0.045 |
| Tritanopia (no blue cones) | #0D7383 | 0.127 |
| Achromatopsia (no color) | #676767 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505FBA
#505FBA
oklch(52% 0.143 273.4)
- #7E6700
#7E6700
oklch(52.1% 0.107 93.5)
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 #505FBA, closest first.
No curated palette has a color within ΔE 0.04 of #505FBA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.034
- French Blue #436BAD ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.048
- Mid Blue #276AB3 ΔE 0.049
- Slate Blue #6A5ACD ΔE 0.049
- Light Indigo #6D5ACF ΔE 0.055
- Warm Blue #4B57DB ΔE 0.057
- Dusky Blue #475F94 ΔE 0.063
Use #505FBA 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.