#3A7EA0
Closest named color: Cerulean (#457B9D). oklch(56.4% 0.086 232.9), rgb(58, 126, 160).
Aa
Black text reads best on this color (4.67:1).
About this color
#3A7EA0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.086 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.012 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.67:1 |
| White text | 4.49:1 |
Values
| HEX | #3A7EA0 |
| RGB | rgb(58, 126, 160) |
| HSL | hsl(200, 47%, 43%) |
| OKLCH | oklch(56.4% 0.086 232.9) |
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 #3A7EA0 | 4.49:1 | AA large text | Lc -76.5 | Fine for body text |
| Black text on #3A7EA0 | 4.67:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #3A7EA0 text on white | 4.49:1 | AA large text | Lc 71.0 | Content text, not long reading |
| #3A7EA0 text on black | 4.67:1 | AA | Lc -30.7 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE5
oklch(88.5% 0.021 232.2)
-
Step 300
300
#A9C6D6
oklch(81% 0.039 232)
-
Step 400
400
#79A8C1
oklch(70.7% 0.062 232)
-
Step 500
500
#5592B2
oklch(63.1% 0.08 232.9)
-
Step 600
600 (this color)
#3A7EA0
oklch(56.4% 0.086 232.9)
-
Step 700
700
#296887
oklch(49.1% 0.081 233.3)
-
Step 800
800
#24556D
oklch(42.7% 0.066 232.5)
-
Step 900
900
#234659
oklch(37.7% 0.052 234.2)
-
Step 950
950
#152934
oklch(26.9% 0.033 233.9)
#3A7EA0 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) | #6D7DA2 | 0.056 |
| Deuteranopia (no green cones) | #5F729F | 0.048 |
| Tritanopia (no blue cones) | #008789 | 0.058 |
| Achromatopsia (no color) | #777777 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A7EA0
#3A7EA0
oklch(56.4% 0.086 232.9)
- #9D6744
#9D6744
oklch(56.4% 0.085 53.1)
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 #3A7EA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.012
- Stormy Blue #507B9C ΔE 0.021
- Dull Blue #49759C ΔE 0.027
- Steel Blue #4682B4 ΔE 0.034
- Teal Blue #01889F ΔE 0.035
- Nice Blue #107AB0 ΔE 0.037
- Ocean #017B92 ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.038
Use #3A7EA0 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.