#2A5FCB
Closest named color: Warm Blue (#4B57DB). oklch(51.4% 0.177 262.4), rgb(42, 95, 203).
Aa
White text reads best on this color (5.83:1).
About this color
#2A5FCB is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.177 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.044 away. White text reads best on it, at 5.83:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #2A5FCB |
| RGB | rgb(42, 95, 203) |
| HSL | hsl(220, 66%, 48%) |
| OKLCH | oklch(51.4% 0.177 262.4) |
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 #2A5FCB | 5.83:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #2A5FCB | 3.59:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #2A5FCB text on white | 5.83:1 | AA | Lc 78.7 | Fine for body text |
| #2A5FCB text on black | 3.59:1 | AA large text | Lc -23.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A3C1F9
oklch(80.9% 0.086 262.7)
-
Step 400
400
#719FF6
oklch(70.7% 0.138 262.3)
-
Step 500
500
#4C84F2
oklch(63.1% 0.175 262.3)
-
Step 600
600
#306AE1
oklch(55.5% 0.192 262.4)
-
Step 700
700 (this color)
#2A5FCB
oklch(51.4% 0.177 262.4)
-
Step 800
800
#1F499E
oklch(42.8% 0.146 262.3)
-
Step 900
900
#1E3E7D
oklch(37.7% 0.114 262.2)
-
Step 950
950
#122549
oklch(27% 0.071 261.9)
#2A5FCB 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) | #056DCF | 0.036 |
| Deuteranopia (no green cones) | #005EC9 | 0.020 |
| Tritanopia (no blue cones) | #00798C | 0.136 |
| Achromatopsia (no color) | #656565 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A5FCB
#2A5FCB
oklch(51.4% 0.177 262.4)
- #856000
#856000
oklch(51.4% 0.106 82.2)
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 #2A5FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.044
- Royal Blue #4169E1 ΔE 0.049
- Mid Blue #276AB3 ΔE 0.051
- Azul #1D5DEC ΔE 0.051
- Neon Blue #4361EE ΔE 0.060
- Cerulean Blue #056EEE ΔE 0.063
- Iris #6258C4 ΔE 0.065
- French Blue #436BAD ΔE 0.066
Use #2A5FCB 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.