#2161CC
Closest named color: Royal Blue (#4169E1). oklch(51.6% 0.178 260.3), rgb(33, 97, 204).
Aa
White text reads best on this color (5.75:1).
About this color
#2161CC is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.178 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.049 away. White text reads best on it, at 5.75:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.64:1 |
| White text | 5.75:1 |
Values
| HEX | #2161CC |
| RGB | rgb(33, 97, 204) |
| HSL | hsl(218, 72%, 46%) |
| OKLCH | oklch(51.6% 0.178 260.3) |
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 #2161CC | 5.75:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #2161CC | 3.64:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #2161CC text on white | 5.75:1 | AA | Lc 78.2 | Fine for body text |
| #2161CC text on black | 3.64:1 | AA large text | Lc -23.6 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A1C2F9
oklch(81% 0.086 260.5)
-
Step 400
400
#6DA0F6
oklch(70.7% 0.138 260.4)
-
Step 500
500
#4585F2
oklch(63% 0.177 260.3)
-
Step 600
600
#266CE1
oklch(55.6% 0.192 260.3)
-
Step 700
700 (this color)
#2161CC
oklch(51.6% 0.178 260.3)
-
Step 800
800
#174A9E
oklch(42.8% 0.147 260.1)
-
Step 900
900
#193F7D
oklch(37.8% 0.114 259.8)
-
Step 950
950
#102549
oklch(26.9% 0.072 260.4)
#2161CC 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) | #0E6ED0 | 0.033 |
| Deuteranopia (no green cones) | #005FCA | 0.015 |
| Tritanopia (no blue cones) | #007B8D | 0.136 |
| Achromatopsia (no color) | #666666 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2161CC
#2161CC
oklch(51.6% 0.178 260.3)
- #876000
#876000
oklch(51.6% 0.107 80.8)
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 #2161CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.049
- Mid Blue #276AB3 ΔE 0.049
- Azul #1D5DEC ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.059
- Neon Blue #4361EE ΔE 0.061
- French Blue #436BAD ΔE 0.066
- Iris #6258C4 ΔE 0.071
Use #2161CC 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.