#2150AB
Closest named color: Cobalt (#1E488F). oklch(45.4% 0.155 261.8), rgb(33, 80, 171).
Aa
White text reads best on this color (7.49:1).
About this color
#2150AB is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.155 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.049 away. White text reads best on it, at 7.49:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.80:1 |
| White text | 7.49:1 |
Values
| HEX | #2150AB |
| RGB | rgb(33, 80, 171) |
| HSL | hsl(220, 68%, 40%) |
| OKLCH | oklch(45.4% 0.155 261.8) |
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 #2150AB | 7.49:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #2150AB | 2.80:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #2150AB text on white | 7.49:1 | AAA | Lc 85.6 | Fine for body text |
| #2150AB text on black | 2.80:1 | Fails | Lc -16.5 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A1C1FC
oklch(80.9% 0.091 262.4)
-
Step 400
400
#6D9FFA
oklch(70.7% 0.144 261.6)
-
Step 500
500
#4783F8
oklch(63.1% 0.186 262.1)
-
Step 600
600
#2969E7
oklch(55.6% 0.202 262)
-
Step 700
700
#1C57C8
oklch(49.1% 0.186 261.7)
-
Step 800
800 (this color)
#2150AB
oklch(45.4% 0.155 261.8)
-
Step 900
900
#1A3D81
oklch(37.7% 0.122 261.9)
-
Step 950
950
#10254B
oklch(27.1% 0.076 261.2)
#2150AB 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) | #0B5BAE | 0.029 |
| Deuteranopia (no green cones) | #004FA9 | 0.017 |
| Tritanopia (no blue cones) | #006675 | 0.120 |
| Achromatopsia (no color) | #555555 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2150AB
#2150AB
oklch(45.4% 0.155 261.8)
- #705000
#705000
oklch(45.4% 0.094 81.9)
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 #2150AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.049
- Dusk Blue #26538D ΔE 0.051
- Blue Blue #2242C7 ΔE 0.055
- Sapphire #2138AB ΔE 0.058
- Blueberry #464196 ΔE 0.060
- Denim Blue #3B5B92 ΔE 0.061
- Light Navy #155084 ΔE 0.065
- Light Navy Blue #2E5A88 ΔE 0.069
Use #2150AB 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.