#455BBC
Closest named color: Iris (#6258C4). oklch(50.7% 0.154 270.4), rgb(69, 91, 188).
Aa
White text reads best on this color (6.04:1).
About this color
#455BBC is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.154 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.042 away. White text reads best on it, at 6.04:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.47:1 |
| White text | 6.04:1 |
Values
| HEX | #455BBC |
| RGB | rgb(69, 91, 188) |
| HSL | hsl(229, 47%, 50%) |
| OKLCH | oklch(50.7% 0.154 270.4) |
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 #455BBC | 6.04:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #455BBC | 3.47:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #455BBC text on white | 6.04:1 | AA | Lc 79.9 | Fine for body text |
| #455BBC text on black | 3.47:1 | AA large text | Lc -21.9 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED8F5
oklch(88.4% 0.041 270.4)
-
Step 300
300
#AEBFF2
oklch(80.9% 0.075 270.3)
-
Step 400
400
#849CEB
oklch(70.7% 0.119 270.3)
-
Step 500
500
#6781E5
oklch(63.1% 0.153 270.5)
-
Step 600
600
#5068D3
oklch(55.5% 0.166 270.6)
-
Step 700
700 (this color)
#455BBC
oklch(50.7% 0.154 270.4)
-
Step 800
800
#354794
oklch(42.7% 0.128 270.3)
-
Step 900
900
#2E3C76
oklch(37.6% 0.1 270.7)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#455BBC 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) | #2268BF | 0.041 |
| Deuteranopia (no green cones) | #005EBA | 0.046 |
| Tritanopia (no blue cones) | #007283 | 0.131 |
| Achromatopsia (no color) | #636363 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455BBC
#455BBC
oklch(50.7% 0.154 270.4)
- #7C6200
#7C6200
oklch(50.8% 0.104 90.5)
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 #455BBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.042
- Mid Blue #276AB3 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.050
- French Blue #436BAD ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.058
- Slate Blue #6A5ACD ΔE 0.059
- Royal Blue #4169E1 ΔE 0.064
- Light Indigo #6D5ACF ΔE 0.065
Use #455BBC 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.