#2165B8
Closest named color: Mid Blue (#276AB3). oklch(51% 0.147 255.8), rgb(33, 101, 184).
Aa
White text reads best on this color (5.80:1).
About this color
#2165B8 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.147 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.018 away. White text reads best on it, at 5.80:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #2165B8 |
| RGB | rgb(33, 101, 184) |
| HSL | hsl(213, 70%, 43%) |
| OKLCH | oklch(51% 0.147 255.8) |
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 #2165B8 | 5.80:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #2165B8 | 3.61:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #2165B8 text on white | 5.80:1 | AA | Lc 78.6 | Fine for body text |
| #2165B8 text on black | 3.61:1 | AA large text | Lc -23.2 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A3C3EF
oklch(80.9% 0.072 256.4)
-
Step 400
400
#70A3E7
oklch(70.8% 0.114 255.9)
-
Step 500
500
#488ADF
oklch(63% 0.145 255.7)
-
Step 600
600
#2872CD
oklch(55.6% 0.158 255.9)
-
Step 700
700 (this color)
#2165B8
oklch(51% 0.147 255.8)
-
Step 800
800
#194E90
oklch(42.7% 0.122 256.1)
-
Step 900
900
#1B4273
oklch(37.8% 0.095 255.6)
-
Step 950
950
#112743
oklch(27.1% 0.059 255.4)
#2165B8 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) | #396DBB | 0.031 |
| Deuteranopia (no green cones) | #175FB6 | 0.019 |
| Tritanopia (no blue cones) | #007985 | 0.112 |
| Achromatopsia (no color) | #656565 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2165B8
#2165B8
oklch(51% 0.147 255.8)
- #895C00
#895C00
oklch(51.1% 0.107 75.8)
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 #2165B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.018
- French Blue #436BAD ΔE 0.040
- Flat Blue #3C73A8 ΔE 0.057
- Windows Blue #3778BF ΔE 0.058
- Peacock Blue #016795 ΔE 0.060
- Muted Blue #3B719F ΔE 0.062
- Ocean Blue #03719C ΔE 0.062
- Dusky Blue #475F94 ΔE 0.063
Use #2165B8 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.