#545EB1
Closest named color: Iris (#6258C4). oklch(51.5% 0.13 275.7), rgb(84, 94, 177).
Aa
White text reads best on this color (5.81:1).
About this color
#545EB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.130 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.040 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #545EB1 |
| RGB | rgb(84, 94, 177) |
| HSL | hsl(234, 37%, 51%) |
| OKLCH | oklch(51.5% 0.13 275.7) |
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 #545EB1 | 5.81:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #545EB1 | 3.61:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #545EB1 text on white | 5.81:1 | AA | Lc 78.9 | Fine for body text |
| #545EB1 text on black | 3.61:1 | AA large text | Lc -22.9 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B5BEEA
oklch(80.9% 0.063 275.9)
-
Step 400
400
#8F9BDF
oklch(70.6% 0.101 275.8)
-
Step 500
500
#7481D7
oklch(63.1% 0.13 275.5)
-
Step 600
600
#5E69C4
oklch(55.6% 0.14 275.7)
-
Step 700
700 (this color)
#545EB1
oklch(51.5% 0.13 275.7)
-
Step 800
800
#404789
oklch(42.6% 0.108 276.2)
-
Step 900
900
#363C6E
oklch(37.7% 0.085 276.3)
-
Step 950
950
#1F2440
oklch(27% 0.052 274.7)
#545EB1 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) | #3969B4 | 0.039 |
| Deuteranopia (no green cones) | #2F62AF | 0.042 |
| Tritanopia (no blue cones) | #2B707F | 0.115 |
| Achromatopsia (no color) | #656565 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #545EB1
#545EB1
oklch(51.5% 0.13 275.7)
- #7A6600
#7A6600
oklch(51.4% 0.106 95.5)
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 #545EB1, closest first.
No curated palette has a color within ΔE 0.04 of #545EB1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.040
- French Blue #436BAD ΔE 0.040
- Dusky Blue #475F94 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.061
- Light Indigo #6D5ACF ΔE 0.061
Use #545EB1 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.