#2A5BD3
Closest named color: Warm Blue (#4B57DB). oklch(51.2% 0.193 264), rgb(42, 91, 211).
Aa
White text reads best on this color (5.93:1).
About this color
#2A5BD3 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.193 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.036 away. White text reads best on it, at 5.93:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.53:1 |
| White text | 5.93:1 |
Values
| HEX | #2A5BD3 |
| RGB | rgb(42, 91, 211) |
| HSL | hsl(223, 67%, 50%) |
| OKLCH | oklch(51.2% 0.193 264) |
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 #2A5BD3 | 5.93:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #2A5BD3 | 3.53:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #2A5BD3 text on white | 5.93:1 | AA | Lc 79.1 | Fine for body text |
| #2A5BD3 text on black | 3.53:1 | AA large text | Lc -22.7 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8DAFC
oklch(88.6% 0.051 263.2)
-
Step 300
300
#A2C0FE
oklch(80.8% 0.094 264.4)
-
Step 400
400
#709DFD
oklch(70.6% 0.149 264)
-
Step 500
500
#4C81FB
oklch(63.1% 0.191 264)
-
Step 600
600
#3167EA
oklch(55.7% 0.207 263.9)
-
Step 700
700 (this color)
#2A5BD3
oklch(51.2% 0.193 264)
-
Step 800
800
#1F46A5
oklch(42.8% 0.16 263.9)
-
Step 900
900
#1E3C82
oklch(37.7% 0.124 263.9)
-
Step 950
950
#12244C
oklch(27% 0.078 263.8)
#2A5BD3 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) | #006CD7 | 0.042 |
| Deuteranopia (no green cones) | #005CD1 | 0.019 |
| Tritanopia (no blue cones) | #00798E | 0.149 |
| Achromatopsia (no color) | #646464 | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A5BD3
#2A5BD3
oklch(51.2% 0.193 264)
- #836000
#836000
oklch(51.1% 0.105 83.6)
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 #2A5BD3, closest first.
No curated palette has a color within ΔE 0.04 of #2A5BD3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.036
- Azul #1D5DEC ΔE 0.039
- Royal Blue #4169E1 ΔE 0.048
- Neon Blue #4361EE ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.059
- Blue Blue #2242C7 ΔE 0.063
- Bright Blue #0165FC ΔE 0.066
- Mid Blue #276AB3 ΔE 0.067
Use #2A5BD3 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.