#4281A2
Closest named color: Cerulean (#457B9D). oklch(57.5% 0.082 233.6), rgb(66, 129, 162).
Aa
Black text reads best on this color (4.89:1).
About this color
#4281A2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.082 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.017 away. Black text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.89:1 |
| White text | 4.29:1 |
Values
| HEX | #4281A2 |
| RGB | rgb(66, 129, 162) |
| HSL | hsl(201, 42%, 45%) |
| OKLCH | oklch(57.5% 0.082 233.6) |
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 #4281A2 | 4.29:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #4281A2 | 4.89:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #4281A2 text on white | 4.29:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #4281A2 text on black | 4.89:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#AAC5D5
oklch(80.8% 0.037 233.9)
-
Step 400
400
#7CA7C0
oklch(70.6% 0.059 234.2)
-
Step 500
500
#5991B0
oklch(63% 0.075 234)
-
Step 600
600 (this color)
#4281A2
oklch(57.5% 0.082 233.6)
-
Step 700
700
#2E6885
oklch(49.2% 0.076 233)
-
Step 800
800
#27556C
oklch(42.8% 0.063 232.6)
-
Step 900
900
#254658
oklch(37.7% 0.05 234)
-
Step 950
950
#162933
oklch(26.9% 0.031 232.5)
#4281A2 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) | #7180A4 | 0.054 |
| Deuteranopia (no green cones) | #6476A1 | 0.045 |
| Tritanopia (no blue cones) | #008A8C | 0.059 |
| Achromatopsia (no color) | #7A7A7A | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4281A2
#4281A2
oklch(57.5% 0.082 233.6)
- #9F6B49
#9F6B49
oklch(57.5% 0.082 53.5)
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 #4281A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.017
- Stormy Blue #507B9C ΔE 0.020
- Steel Blue #4682B4 ΔE 0.029
- Off Blue #5684AE ΔE 0.030
- Dull Blue #49759C ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.034
- Teal Blue #01889F ΔE 0.035
- Cool Blue #4984B8 ΔE 0.035
Use #4281A2 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.