#455BE1
Closest named color: Warm Blue (#4B57DB). oklch(53.5% 0.204 270.7), rgb(69, 91, 225).
Aa
White text reads best on this color (5.47:1).
About this color
#455BE1 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.204 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.014 away. White text reads best on it, at 5.47:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.204) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.83:1 |
| White text | 5.47:1 |
Values
| HEX | #455BE1 |
| RGB | rgb(69, 91, 225) |
| HSL | hsl(232, 72%, 58%) |
| OKLCH | oklch(53.5% 0.204 270.7) |
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 #455BE1 | 5.47:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #455BE1 | 3.83:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #455BE1 text on white | 5.47:1 | AA | Lc 76.8 | Fine for body text |
| #455BE1 text on black | 3.83:1 | AA large text | Lc -25.0 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#AABEFD
oklch(80.9% 0.092 270.6)
-
Step 400
400
#7F9AFC
oklch(70.8% 0.147 270.7)
-
Step 500
500
#617DF9
oklch(63.2% 0.187 270.6)
-
Step 600
600 (this color)
#455BE1
oklch(53.5% 0.204 270.7)
-
Step 700
700
#3C50CA
oklch(49.2% 0.189 270.6)
-
Step 800
800
#3142A3
oklch(42.6% 0.157 270.7)
-
Step 900
900
#2B3981
oklch(37.6% 0.122 271.1)
-
Step 950
950
#19224C
oklch(27% 0.078 271.2)
#455BE1 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) | #0071E5 | 0.058 |
| Deuteranopia (no green cones) | #0062DE | 0.042 |
| Tritanopia (no blue cones) | #007D95 | 0.165 |
| Achromatopsia (no color) | #696969 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455BE1
#455BE1
oklch(53.5% 0.204 270.7)
- #856A00
#856A00
oklch(53.5% 0.109 91.1)
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 #455BE1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.014
- Neon Blue #4361EE ΔE 0.024
- Royal Blue #4169E1 ΔE 0.033
- Azul #1D5DEC ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.054
- Bright Blue #0165FC ΔE 0.056
- Iris #6258C4 ΔE 0.058
Use #455BE1 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.