#2977E4
Closest named color: Cerulean Blue (#056EEE). oklch(58.2% 0.182 258), rgb(41, 119, 228).
Aa
Black text reads best on this color (4.85:1).
About this color
#2977E4 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.182 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.033 away. Black text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #2977E4 |
| RGB | rgb(41, 119, 228) |
| HSL | hsl(215, 78%, 53%) |
| OKLCH | oklch(58.2% 0.182 258) |
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 #2977E4 | 4.32:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #2977E4 | 4.85:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #2977E4 text on white | 4.32:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #2977E4 text on black | 4.85:1 | AA | Lc -32.2 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#A0C3F6
oklch(81% 0.082 257.7)
-
Step 400
400
#6BA1F1
oklch(70.6% 0.131 258)
-
Step 500
500
#4288ED
oklch(63.2% 0.168 257.9)
-
Step 600
600 (this color)
#2977E4
oklch(58.2% 0.182 258)
-
Step 700
700
#115CBE
oklch(49.1% 0.169 257.9)
-
Step 800
800
#124C9A
oklch(42.8% 0.14 257.8)
-
Step 900
900
#17407A
oklch(37.7% 0.109 257.8)
-
Step 950
950
#0F2648
oklch(27.1% 0.07 258.2)
#2977E4 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) | #3782E8 | 0.032 |
| Deuteranopia (no green cones) | #0072E2 | 0.021 |
| Tritanopia (no blue cones) | #0091A2 | 0.139 |
| Achromatopsia (no color) | #797979 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2977E4
#2977E4
oklch(58.2% 0.182 258)
- #A27000
#A27000
oklch(58.2% 0.121 77.7)
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 #2977E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.033
- Royal Blue #4169E1 ΔE 0.036
- Clear Blue #247AFD ΔE 0.038
- Neon Blue #4361EE ΔE 0.056
- Windows Blue #3778BF ΔE 0.058
- Water Blue #0E87CC ΔE 0.061
- Bright Blue #0165FC ΔE 0.062
- Azul #1D5DEC ΔE 0.067
Use #2977E4 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.