#2170C6
Closest named color: Mid Blue (#276AB3). oklch(54.5% 0.153 254.1), rgb(33, 112, 198).
Aa
White text reads best on this color (5.00:1).
About this color
#2170C6 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.153 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.032 away. White text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #2170C6 |
| RGB | rgb(33, 112, 198) |
| HSL | hsl(211, 71%, 45%) |
| OKLCH | oklch(54.5% 0.153 254.1) |
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 #2170C6 | 5.00:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #2170C6 | 4.19:1 | AA large text | Lc 30.0 | Dividers and decoration only |
| #2170C6 text on white | 5.00:1 | AA | Lc 74.1 | Content text, not long reading |
| #2170C6 text on black | 4.19:1 | AA large text | Lc -27.6 | 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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A2C4ED
oklch(81% 0.069 253.4)
-
Step 400
400
#6FA4E4
oklch(70.8% 0.11 253.8)
-
Step 500
500
#478BDC
oklch(63% 0.141 254.3)
-
Step 600
600 (this color)
#2170C6
oklch(54.5% 0.153 254.1)
-
Step 700
700
#1760AF
oklch(49% 0.143 254.4)
-
Step 800
800
#174F8D
oklch(42.7% 0.117 254.2)
-
Step 900
900
#1A4271
oklch(37.7% 0.092 254.4)
-
Step 950
950
#102742
oklch(27% 0.058 253.9)
#2170C6 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) | #4477C9 | 0.036 |
| Deuteranopia (no green cones) | #2269C4 | 0.019 |
| Tritanopia (no blue cones) | #008591 | 0.116 |
| Achromatopsia (no color) | #6F6F6F | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2170C6
#2170C6
oklch(54.5% 0.153 254.1)
- #976400
#976400
oklch(54.4% 0.115 74.2)
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 #2170C6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.032
- Windows Blue #3778BF ΔE 0.032
- French Blue #436BAD ΔE 0.044
- Nice Blue #107AB0 ΔE 0.049
- Flat Blue #3C73A8 ΔE 0.052
- Royal Blue #4169E1 ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.062
- Water Blue #0E87CC ΔE 0.062
Use #2170C6 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.