#2973E9
Closest named color: Cerulean Blue (#056EEE). oklch(57.8% 0.193 259.7), rgb(41, 115, 233).
Aa
Black text reads best on this color (4.72:1).
About this color
#2973E9 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.193 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.022 away. Black text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #2973E9 |
| RGB | rgb(41, 115, 233) |
| HSL | hsl(217, 81%, 54%) |
| OKLCH | oklch(57.8% 0.193 259.7) |
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 #2973E9 | 4.44:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #2973E9 | 4.72:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #2973E9 text on white | 4.44:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #2973E9 text on black | 4.72:1 | AA | Lc -31.4 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A0C2F9
oklch(80.9% 0.087 259.9)
-
Step 400
400
#6BA0F6
oklch(70.6% 0.139 259.7)
-
Step 500
500
#4386F3
oklch(63.2% 0.177 259.7)
-
Step 600
600 (this color)
#2973E9
oklch(57.8% 0.193 259.7)
-
Step 700
700
#1459C4
oklch(49% 0.18 259.8)
-
Step 800
800
#144A9E
oklch(42.7% 0.148 259.6)
-
Step 900
900
#183F7E
oklch(37.8% 0.116 259.7)
-
Step 950
950
#0F254A
oklch(27% 0.074 260.2)
#2973E9 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) | #2381ED | 0.035 |
| Deuteranopia (no green cones) | #006FE7 | 0.020 |
| Tritanopia (no blue cones) | #0090A3 | 0.149 |
| Achromatopsia (no color) | #787878 | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2973E9
#2973E9
oklch(57.8% 0.193 259.7)
- #9E7000
#9E7000
oklch(57.7% 0.12 80)
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 #2973E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.022
- Royal Blue #4169E1 ΔE 0.029
- Clear Blue #247AFD ΔE 0.033
- Neon Blue #4361EE ΔE 0.045
- Bright Blue #0165FC ΔE 0.049
- Azul #1D5DEC ΔE 0.055
- Windows Blue #3778BF ΔE 0.068
- Warm Blue #4B57DB ΔE 0.069
Use #2973E9 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.