#215BCB
Closest named color: Warm Blue (#4B57DB). oklch(50.3% 0.184 261.8), rgb(33, 91, 203).
Aa
White text reads best on this color (6.13:1).
About this color
#215BCB is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.184 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.048 away. White text reads best on it, at 6.13:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.42:1 |
| White text | 6.13:1 |
Values
| HEX | #215BCB |
| RGB | rgb(33, 91, 203) |
| HSL | hsl(220, 72%, 46%) |
| OKLCH | oklch(50.3% 0.184 261.8) |
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 #215BCB | 6.13:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #215BCB | 3.42:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #215BCB text on white | 6.13:1 | AA | Lc 80.0 | Fine for body text |
| #215BCB text on black | 3.42:1 | AA large text | Lc -21.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A1C1FB
oklch(80.8% 0.09 262.1)
-
Step 400
400
#6E9FF9
oklch(70.7% 0.143 261.7)
-
Step 500
500
#4884F6
oklch(63.2% 0.182 261.8)
-
Step 600
600
#2A6AE5
oklch(55.6% 0.198 261.7)
-
Step 700
700 (this color)
#215BCB
oklch(50.3% 0.184 261.8)
-
Step 800
800
#1A48A1
oklch(42.7% 0.153 261.8)
-
Step 900
900
#1B3E80
oklch(37.8% 0.119 261.6)
-
Step 950
950
#11254B
oklch(27.1% 0.075 261.8)
#215BCB 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) | #006ACF | 0.037 |
| Deuteranopia (no green cones) | #005AC9 | 0.014 |
| Tritanopia (no blue cones) | #00778A | 0.142 |
| Achromatopsia (no color) | #626262 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #215BCB
#215BCB
oklch(50.3% 0.184 261.8)
- #815D00
#815D00
oklch(50.3% 0.104 82.2)
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 #215BCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.048
- Azul #1D5DEC ΔE 0.051
- Blue Blue #2242C7 ΔE 0.058
- Mid Blue #276AB3 ΔE 0.059
- Royal Blue #4169E1 ΔE 0.059
- Neon Blue #4361EE ΔE 0.066
- Cerulean Blue #056EEE ΔE 0.069
- Iris #6258C4 ΔE 0.073
Use #215BCB 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.