#2A5FD0
Closest named color: Warm Blue (#4B57DB). oklch(51.8% 0.184 262.8), rgb(42, 95, 208).
Aa
White text reads best on this color (5.75:1).
About this color
#2A5FD0 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.184 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.040 away. White text reads best on it, at 5.75:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.64:1 |
| White text | 5.75:1 |
Values
| HEX | #2A5FD0 |
| RGB | rgb(42, 95, 208) |
| HSL | hsl(221, 66%, 49%) |
| OKLCH | oklch(51.8% 0.184 262.8) |
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 #2A5FD0 | 5.75:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #2A5FD0 | 3.64:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #2A5FD0 text on white | 5.75:1 | AA | Lc 78.2 | Fine for body text |
| #2A5FD0 text on black | 3.64:1 | AA large text | Lc -23.5 | 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 700.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FB
oklch(80.9% 0.089 262.7)
-
Step 400
400
#709EF9
oklch(70.6% 0.143 262.9)
-
Step 500
500
#4B83F6
oklch(63.1% 0.182 262.8)
-
Step 600
600
#2F69E5
oklch(55.6% 0.198 262.8)
-
Step 700
700 (this color)
#2A5FD0
oklch(51.8% 0.184 262.8)
-
Step 800
800
#1E48A1
oklch(42.8% 0.152 262.7)
-
Step 900
900
#1D3D80
oklch(37.7% 0.12 262.8)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#2A5FD0 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) | #006ED4 | 0.038 |
| Deuteranopia (no green cones) | #005FCE | 0.019 |
| Tritanopia (no blue cones) | #007B8E | 0.143 |
| Achromatopsia (no color) | #666666 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A5FD0
#2A5FD0
oklch(51.8% 0.184 262.8)
- #866100
#866100
oklch(51.7% 0.106 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 #2A5FD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.040
- Royal Blue #4169E1 ΔE 0.044
- Azul #1D5DEC ΔE 0.044
- Neon Blue #4361EE ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.056
- Mid Blue #276AB3 ΔE 0.057
- Iris #6258C4 ΔE 0.066
- Bright Blue #0165FC ΔE 0.068
Use #2A5FD0 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.