#2157CF
Closest named color: Warm Blue (#4B57DB). oklch(49.8% 0.194 263), rgb(33, 87, 207).
Aa
White text reads best on this color (6.30:1).
About this color
#2157CF is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.194 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.046 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.32:1 |
| White text | 6.30:1 |
Values
| HEX | #2157CF |
| RGB | rgb(33, 87, 207) |
| HSL | hsl(221, 73%, 47%) |
| OKLCH | oklch(49.8% 0.194 263) |
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 #2157CF | 6.30:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #2157CF | 3.32:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #2157CF text on white | 6.30:1 | AA | Lc 80.7 | Fine for body text |
| #2157CF text on black | 3.32:1 | AA large text | Lc -21.1 | 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFD
oklch(88.5% 0.053 262.7)
-
Step 300
300
#A1C1FE
oklch(81% 0.094 263)
-
Step 400
400
#6E9EFE
oklch(70.8% 0.15 263)
-
Step 500
500
#4882FC
oklch(63.2% 0.192 263)
-
Step 600
600
#2B67EB
oklch(55.6% 0.209 263)
-
Step 700
700 (this color)
#2157CF
oklch(49.8% 0.194 263)
-
Step 800
800
#1B46A5
oklch(42.6% 0.161 263)
-
Step 900
900
#1B3C83
oklch(37.6% 0.126 263)
-
Step 950
950
#11244D
oklch(27.1% 0.08 263.3)
#2157CF 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) | #0068D3 | 0.041 |
| Deuteranopia (no green cones) | #0058CD | 0.013 |
| Tritanopia (no blue cones) | #00768A | 0.151 |
| Achromatopsia (no color) | #606060 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2157CF
#2157CF
oklch(49.8% 0.194 263)
- #7F5C00
#7F5C00
oklch(49.8% 0.102 82.7)
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 #2157CF, closest first.
No curated palette has a color within ΔE 0.04 of #2157CF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.046
- Azul #1D5DEC ΔE 0.047
- Blue Blue #2242C7 ΔE 0.050
- Royal Blue #4169E1 ΔE 0.063
- Neon Blue #4361EE ΔE 0.064
- Majorelle Blue #3F37C9 ΔE 0.069
- Mid Blue #276AB3 ΔE 0.070
- Cerulean Blue #056EEE ΔE 0.071
Use #2157CF 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.