#2251B1
Closest named color: Blue Blue (#2242C7). oklch(46.2% 0.162 262.4), rgb(34, 81, 177).
Aa
White text reads best on this color (7.29:1).
About this color
#2251B1 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.162 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.049 away. White text reads best on it, at 7.29:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.87:1 |
| White text | 7.29:1 |
Values
| HEX | #2251B1 |
| RGB | rgb(34, 81, 177) |
| HSL | hsl(220, 68%, 41%) |
| OKLCH | oklch(46.2% 0.162 262.4) |
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 #2251B1 | 7.29:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #2251B1 | 2.87:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #2251B1 text on white | 7.29:1 | AAA | Lc 84.8 | Fine for body text |
| #2251B1 text on black | 2.87:1 | Fails | Lc -17.2 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A6C1F4
oklch(80.9% 0.078 262.9)
-
Step 400
400
#76A0EF
oklch(70.8% 0.125 262.3)
-
Step 500
500
#5285E9
oklch(63% 0.16 262.4)
-
Step 600
600
#376DD7
oklch(55.7% 0.173 262.1)
-
Step 700
700 (this color)
#2251B1
oklch(46.2% 0.162 262.4)
-
Step 800
800
#244A97
oklch(42.7% 0.134 262.5)
-
Step 900
900
#223F78
oklch(37.8% 0.103 262.3)
-
Step 950
950
#142546
oklch(26.9% 0.066 262.3)
#2251B1 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) | #005DB4 | 0.032 |
| Deuteranopia (no green cones) | #0050AF | 0.017 |
| Tritanopia (no blue cones) | #006979 | 0.126 |
| Achromatopsia (no color) | #565656 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2251B1
#2251B1
oklch(46.2% 0.162 262.4)
- #725200
#725200
oklch(46.1% 0.095 82.4)
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 #2251B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.049
- Cobalt #1E488F ΔE 0.059
- Dusk Blue #26538D ΔE 0.059
- Sapphire #2138AB ΔE 0.061
- Blueberry #464196 ΔE 0.065
- Denim Blue #3B5B92 ΔE 0.066
- Mid Blue #276AB3 ΔE 0.069
- Majorelle Blue #3F37C9 ΔE 0.070
Use #2251B1 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.